The Knowledge Factory - Sur le même thème https://www.cea.fr/drf/english/Pages/News/Scientific-results/2022/record-coherence-time-for-a-hole-spin-in-natural-silicon.aspx DRF english version en-US https://www.cea.fr/_layouts/15/images/i2i/icon-144x144-1033.png The Knowledge Factory - Sur le même thème https://www.cea.fr/drf/english Indium phosphide quantum dots see red and even infrared https://www.cea.fr/drf/english/Pages/News/Scientific-results/2023/indium-phosphide-quantum-dots-see-red-and-even-infrared.aspx Researchers at Irig have developed an original synthesis that enables them to produce indium phosphide quantum dots that are larger than ever before. These components, which emit up to the near infrared, are of interest both for photovoltaics and in vivo imaging. Materials ; Photonics general public ; Journalists ; Researchers IRIG Découvertes et avancées ; Scientific result Wed, 28 Jun 2023 10:00:00 GMT Evaluating the stress response of a bacterium using optical tweezers on a chip https://www.cea.fr/drf/english/Pages/News/Scientific-results/2022/evaluating-the-stress-response-of-a-bacterium-using-optical-tweezers-on-a-chip.aspx Physicists at the CEA-Irig and their partners in Grenoble (CEA-Leti, CNRS, UGA) have shown that it is possible to trap individual bacteria and measure their response to stress using silicon photonic crystals. This disruptive technique, which does not require cell culture, opens the way to rapid antibiotic resistance tests. Photonics ; Micro-nanotechnologies ; Bacteria ; Antibiotics ; Diagnosis and innovative treatment general public ; Journalists ; Researchers IRIG Découvertes et avancées ; Scientific result Wed, 19 Oct 2022 10:00:00 GMT Record coherence time for a hole spin in natural silicon https://www.cea.fr/drf/english/Pages/News/Scientific-results/2022/record-coherence-time-for-a-hole-spin-in-natural-silicon.aspx Researchers at the CEA-Irig have demonstrated that there is an optimal configuration for bringing the coherence times of hole spins closer to those of electron spins. Spintronics ; Quantum Physics ; Micro-nanotechnologies general public ; Journalists ; Researchers Découvertes et avancées ; Scientific result Thu, 22 Sep 2022 10:00:00 GMT Controlling the chirality of skyrmions by a gate voltage https://www.cea.fr/drf/english/Pages/News/Scientific-results/2022/controlling-the-chirality-of-skyrmions-by-a-gate-voltage.aspx Researchers at Irig and their partners have demonstrated for the first time that it is possible, through the simple application of a gate voltage, to change the winding direction of magnetization “nano-vortices” (skyrmions), and thus to individually control the direction of their motion. This breakthrough opens up new possibilities for research in information processing (multiplexing, etc.). Spintronics general public ; Journalists ; Researchers IRIG Découvertes et avancées ; Scientific result Thu, 15 Sep 2022 10:00:00 GMT A key role for quantum entanglement https://www.cea.fr/drf/english/Pages/News/Scientific-results/2022/a-key-role-for-quantum-entanglement.aspx A method known as quantum key distribution has long held the promise of communication security unattainable in conventional cryptography. An international team of scientists has now demonstrated experimentally, for the first time, an approach to quantum key distribution that is based on high-quality quantum entanglement — offering much broader security guarantees than previous schemes. Quantum Physics ; Communications ; Defence & security general public ; Journalists ; Researchers IPhT Découvertes et avancées ; Scientific result Wed, 27 Jul 2022 15:00:00 GMT Developing an identity card for each quantum bit on silicon https://www.cea.fr/drf/english/Pages/News/Scientific-results/2022/developing-an-identity-card-for-each-quantum-bit-on-silicon.aspx Using a “pump-probe” spectroscopic technique, researchers at the CEA-Irig have succeeded in creating an authentic identity map of individual quantum bits, based on the spin of holes in silicon. This is an essential task that can easily be extrapolated to high qubit densities! Spintronics ; Micro-nanoelectronics ; Quantum Physics general public ; Journalists ; Researchers IRIG Découvertes et avancées ; Scientific result Tue, 18 Jan 2022 11:00:00 GMT Detecting spins with a single photon counter https://www.cea.fr/drf/english/Pages/News/Scientific-results/2022/detecting-spins-with-a-single-photon-counter.aspx According to researchers from the CEA-Iramis, it is now possible to detect spins thanks to an original method using a single photon sensor that is insensitive to noise. This is a major step forward for the measurement of spin quantum bits or their conversion into photons. Quantum Physics ; Spintronics general public ; Journalists ; Researchers Iramis Découvertes et avancées ; Scientific result Fri, 17 Dec 2021 11:00:00 GMT Observation of the electric dipole associated with spin waves in graphene https://www.cea.fr/drf/english/Pages/News/Scientific-results/2022/observation-of-the-electric-dipole-associated-with-spin-waves-in-graphene.aspx Using an electronic analog of a Mach-Zehnder interferometer, researchers from the CEA-Iramis and their partners observed for the first time the electric dipole associated with spin waves (magnons) in a ferromagnet in the quantum Hall regime. These spin waves could be used in particular to transfer information from one quantum bit to another. Quantum Physics ; Micro-nanoelectronics general public ; Journalists ; Researchers Iramis Découvertes et avancées ; Scientific result Fri, 17 Dec 2021 11:00:00 GMT Quantum physics: a record coherence time for erbium spins https://www.cea.fr/drf/english/Pages/News/Scientific-results/2022/quantum-physics-a-record-coherence-time-for-erbium-spins.aspx Researchers from CEA-Iramis have demonstrated that, contrary to what is generally believed, the electronic spin carried by erbium can have a long coherence time. This makes it a good candidate for relaying quantum information via photons. Quantum Physics ; Spintronics general public ; Journalists ; Researchers Iramis Découvertes et avancées ; Scientific result Fri, 17 Dec 2021 11:00:00 GMT Paired with quantum memory, quantum computers can “shrink” by a factor of a thousand! https://www.cea.fr/drf/english/Pages/News/Scientific-results/2021/paired-with-quantum-memory-quantum-computers-can-shrink-by-a-factor-of-a-thousand.aspx Theoretical physicists at the IPhT have shown that by equipping a quantum processor with quantum memory, it is possible to reduce the number of quantum bits needed to solve an emblematic problem by three orders of magnitude. Computing ; Quantum Physics general public ; Journalists ; Researchers IPhT Découvertes et avancées ; Scientific result Tue, 28 Sep 2021 10:00:00 GMT Quantum physics finds its way into the heart of flowers https://www.cea.fr/drf/english/Pages/News/Scientific-results/2021/quantum-physics-finds-its-way-into-the-heart-of-flowers.aspx Researchers from the CEA-Joliot (I2BC) and their partners have deciphered for the first time the quantum process of energy dissipation in aggregates of natural flower carotenoids. This fundamental biological mechanism could inspire the design of photovoltaic materials capable of supplying two electrons for every photon. Molecular mechanisms ; Vegetal physiology ; Quantum Physics ; Photovoltaic solar power general public ; Journalists ; Researchers Joliot Découvertes et avancées ; Scientific result Fri, 03 Sep 2021 10:00:00 GMT A microwave photon disappears in an array of superconducting Josephson junctions https://www.cea.fr/drf/english/Pages/News/Scientific-results/2021/a-microwave-photon-disappears-in-an-array-of-superconducting-josephson-junctions.aspx It is as if a microwave photon interacting with a small superconducting junction was split into several photons of lower energy! This is the scenario proposed by an IRIG researcher to interpret recent experiments using a network of superconducting Josephson junctions. Quantum Physics ; Micro-nanotechnologies ; Photonics ; Theoretical physics general public ; Journalists ; Researchers IRIG Découvertes et avancées ; Scientific result Wed, 09 Jun 2021 10:00:00 GMT A 3-in-1 agent https://www.cea.fr/drf/english/Pages/News/Scientific-results/2021/An--agent.aspx BIAM researchers, together with international partners, have succeeded in developing a contrast agent that improves the accuracy of medical imaging, and that is also capable of treating tumors and delivering localized treatment. Micro-nanotechnologies ; Diagnosis and innovative treatment ; Medical imaging ; MRI ; Nanomedicine general public ; Journalists ; Researchers BIAM Découvertes et avancées ; Scientific result Fri, 07 May 2021 10:00:00 GMT Photocatalysis: imogolites facilitate charge separation https://www.cea.fr/drf/english/Pages/News/Scientific-results/2021/photocatalysis-imogolites-facilitate-charge-separation.aspx A team from the Iramis (CEA-CNRS) has shown that aluminosilicate nanotubes (imogolites) have an interesting potential for photocatalysis. These light-activated semiconductors could be functionalized to depollute water, in an environmentally friendly way. Remediation ; Green Chemistry ; Micro-nanotechnologies ; New industrial production processes general public ; Journalists ; Researchers Iramis Découvertes et avancées ; Scientific result Thu, 06 May 2021 10:00:00 GMT Guiding microswimmers by magnetic fields https://www.cea.fr/drf/english/Pages/News/Scientific-results/2021/guiding-microswimmers-by-magnetic-fields.aspx As part of an international collaboration, BIAM researchers have successfully produced 3D-printed microswimmers that can be guided by magnetic fields. Ultimately, these devices could be used within the human body for therapeutic purposes. Micro-nanotechnologies ; Medical imaging ; Nanomedicine general public ; Journalists ; Researchers BIAM Découvertes et avancées ; Scientific result Wed, 05 May 2021 10:00:00 GMT Accelerating electrons without diverting them using a radially polarized laser https://www.cea.fr/drf/english/Pages/News/Scientific-results/2021/accelerating-electrons-without-diverting-them-using-a-radially-polarized-laser.aspx Researchers from the CEA-Iramis and the Laboratoire d’Optique Appliquée (ENSTA/X/CNRS) have succeeded for the first time in efficiently accelerating electrons to relativistic energies using a radially polarized laser. Particle accelerator ; Laser ; Quantum Physics general public ; Journalists ; Researchers Découvertes et avancées ; Scientific result Tue, 27 Apr 2021 10:00:00 GMT Spintronics: Spin absorption now better understood https://www.cea.fr/drf/english/Pages/News/Scientific-results/2021/spintronics--spin-absorption-now-better-understood.aspx Thanks to an original experimental setup, scientists from CEA-IRIG clarified for the first time how the response of a spin current to the perturbation brought by a ferromagnetic material depends on the orientation of the majority spin with respect to the magnetization of the material. A fundamental point for understanding spin transport in spintronic components! Spintronics ; Micro-nanotechnologies general public ; Journalists ; Researchers IRIG Découvertes et avancées ; Scientific result Fri, 09 Apr 2021 10:00:00 GMT Cryo-CMOS electronics for quantum applications https://www.cea.fr/drf/english/Pages/News/Scientific-results/2021/cryo-cmos-electronics-for-quantum-applications.aspx Scientists at CEA-Irig, in close collaboration with CEA-Leti, achieved a unique integration of classical electronics with a quantum system. They demonstrate the possibility of measuring current through quantum dots by CMOS circuitry on a single chip cooled to 10 millikelvin, in Fully Depleted Silicon On Insulator (FD-SOI) technology. Micro-nanoelectronics ; Micro-nanotechnologies ; New technologies ; Quantum Physics general public ; Journalists ; Researchers IRIG Scientific result Thu, 25 Mar 2021 11:00:00 GMT Fortunately enough, a high resistance does not make a superconducting Josephson junction insulating! https://www.cea.fr/drf/english/Pages/News/Scientific-results/2021/fortunately-enough-a-high-resistance-does-not-make-a-superconducting-josephson-junction-insulating.aspx Researchers from CEA-Iramis and their partners refute a widely accepted assertion that the coupling of a Josephson junction to a high resistance is constrained. They thus open the way to new high-impedance devices, previously considered unfeasible. Quantum Physics ; Micro-nanoelectronics ; Micro-nanotechnologies ; New technologies general public ; Journalists ; Researchers Iramis Scientific result Thu, 11 Mar 2021 11:00:00 GMT Protein crown around nanoparticles: Size matters! https://www.cea.fr/drf/english/Pages/News/Scientific-results/2021/protein-crown-around-nanoparticles---size-matters.aspx When immersed in biological media, nanoparticles are immediately "wrapped" in proteins. A study conducted by researchers from the Iramis and Joliot (I2BC) institutes clarifies the importance of protein size on the formation of this envelope and recommends better consideration of this parameter in proteomic and nanotoxicological studies. Micro-nanotechnologies ; Nanomedicine ; Proteomics ; Nanotoxicology general public ; Journalists ; Researchers Iramis Scientific result Wed, 03 Mar 2021 11:00:00 GMT Quantum science: when an artificial atom makes a microwire oscillate https://www.cea.fr/drf/english/Pages/News/Scientific-results/2021/quantum-an-artificial-atom-sets-a-micro-wire-in-motion.aspx A collaboration involving CEA-Irig has succeeded in setting in motion an 18-µm-long mechanical oscillator by optically exciting an embedded artificial atom. This result is an important step towards the realization of interfaces that connect the quantum and classical worlds. Micro-nanotechnologies ; Photonics ; Quantum Physics ; Laser Journalists ; Researchers ; general public IRIG Scientific result Wed, 24 Feb 2021 11:00:00 GMT One entanglement can hide another! https://www.cea.fr/drf/english/Pages/News/Scientific-results/2021/one-entanglement-can-hide-another.aspx A theoretical physicist at the IPhT and his partners at the EPFL (Switzerland) and MIT (USA) have just revealed a temporal form of quantum entanglement. For the first time, this has allowed them to demonstrate a very strong entanglement between a photon and a phonon, in a diamond crystal at room temperature. Their experiment makes it possible to probe the coherence of single phonons on very short time scales, which opens the door to the search for materials for ultrafast quantum technologies. Quantum Physics ; Theoretical physics ; Laser general public ; Journalists ; Researchers IPhT Scientific result Fri, 19 Feb 2021 11:00:00 GMT Spintronics: a breakthrough in nano-oscillators for the analysis of microwave signals https://www.cea.fr/drf/english/Pages/News/Scientific-results/2021/spintronics-a-breakthrough-in-nano-oscillators-for-the-analysis-of-microwave-signals.aspx Researchers at the CEA-Irig and their partners have provided the first demonstration of the potential of “spin-torque nano-oscillators” for use in microwave spectrum analyzers. These ultrafast devices with their nanosecond-scale resolution are proving to perform very well. Spintronics ; Micro-nanotechnologies ; Radio frequency ; Communications general public ; Journalists ; Researchers IRIG Scientific result Thu, 14 Jan 2021 11:00:00 GMT “Quantum supremacy” on a laptop computer? https://www.cea.fr/drf/english/Pages/News/Scientific-results/2021/quantum-supremacy-on-a-laptop-computer.aspx A researcher at the CEA-Irig and his partners have demonstrated that a real (and therefore imperfect) quantum computer is several billion times easier to simulate than a perfect quantum computer! Their conclusion: before increasing the number of quantum bits, it is essential to improve their fidelity. Quantum Physics general public ; Journalists ; Researchers IRIG Scientific result Tue, 12 Jan 2021 11:00:00 GMT New two-dimensional materials for skyrmions https://www.cea.fr/drf/english/Pages/News/Scientific-results/2021/new-two-dimensional-materials-for-skyrmions.aspx Researchers from the CEA-Irig and their partners in France and China are proposing a new family of asymmetric, two-dimensional materials that could produce magnetic skyrmions. These “nano-whirlpools” of magnetization hold promise for next-generation magnetic memories. Spintronics ; Micro-nanotechnologies ; Quantum Physics general public ; Journalists ; Researchers IRIG Scientific result Thu, 17 Dec 2020 11:00:00 GMT When an electron submerged in the Fermi Sea resurfaces... https://www.cea.fr/drf/english/Pages/News/Scientific-results/2021/when-an-electron-submerged-in-the-fermi-sea-resurfaces--.aspx Researchers at Iramis and their partners have succeeded in following the fate of single electrons injected into one-dimensional electronic channels of the quantum Hall regime. These electrons “dissolve” in collective excitations distributed across all parallel channels, and can reappear as a result of constructive interference between these excitations. This is a step forward in the understanding of electron quantum optics. Micro-nanoelectronics ; Micro-nanotechnologies ; Quantum Physics general public ; Journalists ; Researchers Iramis Scientific result Wed, 16 Dec 2020 11:00:00 GMT Nanometer scale skyrmions at room temperature and zero magnetic field https://www.cea.fr/drf/english/Pages/News/Scientific-results/2021/nanometer-scale-skyrmions-at-room-temperature-and-zero-magnetic-field-.aspx Researchers at the CEA-Irig are proposing new magnetic structures that allow the stabilization of nanoscale “skyrmions” without the application of any external magnetic field. This represents another step towards new applications for storing and processing information. Spintronics ; Micro-nanotechnologies general public ; Researchers ; Journalists IRIG Scientific result Fri, 04 Dec 2020 11:00:00 GMT See the technology of tomorrow’s OLED screens emerge https://www.cea.fr/drf/english/Pages/News/Scientific-results/2020/see-the-technology-of-tomorrows-oled-screens-emerge.aspx The CEA, working with ENS Paris-Saclay, and the universities of Rennes and San José (USA), has developed new light-emitting molecules with properties that improve the energy consumption and light production of organic light-emitting diodes (OLEDs). This is the first study correlating the structure and properties of this type of material, which has a promising future in display technologies Chemistry ; Photonics ; New technologies general public ; Journalists ; Researchers DRF Scientific result Thu, 22 Oct 2020 10:00:00 GMT A single photon takes two optical paths by “entangling” them! https://www.cea.fr/drf/english/Pages/News/Scientific-results/2020/a-single-photon-takes-two-optical-paths-by-entangling-them.aspx An IPhT researcher and his partners from the Universities of Geneva and Basel have succeeded for the first time in “entangling” the outputs of two optical fibers sharing a single photon at a distance of 2 km. In this amazing feat, they show how a form of quantum entanglement that is simple to produce can be distributed and then detected over long distances. This is an important step towards the construction of a secure quantum internet! Quantum Physics ; Fundamental Research ; Communications general public ; Journalists ; Researchers IPhT Scientific result Fri, 02 Oct 2020 10:00:00 GMT Fine-tuning nanowire crystalline interfaces for future photonic devices https://www.cea.fr/drf/english/Pages/News/Scientific-results/2020/fine-tuning-nanowire-crystalline-interfaces-for-future-photonic-devices.aspx Researchers from IRIG [collaboration] publish their solution to create an interface between two crystals without generating dislocations, even though their mesh parameters differ by several percent. This work opens up new possibilities for integrated optoelectronics and photonics on silicon. Micro-nanotechnologies general public ; Journalists ; Researchers IRIG Scientific result Tue, 29 Sep 2020 10:00:00 GMT Quantum physics: adding “noise” as a means to completely secure communication https://www.cea.fr/drf/english/Pages/News/Scientific-results/2020/quantum-physics-adding-noise-as-a-means-to-completely-secure-communication.aspx How can the confidentiality of communications be protected if we cannot absolutely trust the devices used to communicate? Researchers from the IPhT, the University of Basel and the ETH Zürich are addressing this question, which is at the heart of quantum cryptography research. Communications ; Quantum Physics general public ; Journalists ; Researchers IPhT Scientific result Wed, 23 Sep 2020 10:00:00 GMT European SpinTronicFactory network publishes spintronics road map https://www.cea.fr/drf/english/Pages/News/Institutional-news/2020/european-spintronicfactory-network-publishes-spintronics-road-map.aspx On August 19, 2020, the European consortium SpinTronicFactory, led by the French laboratories[1] Spintec (CEA, CNRS, Université Grenoble Alpes) and Thales-CNRS Joint Unit (Palaiseau), published an ambitious spintronics road map in Nature Electronics. The field, at the frontier between magnetism and microelectronics, is coming of age, and offers wide possibilities for innovation. Spintronics ; New technologies ; Micro-nanoelectronics general public ; Journalists ; Researchers IRIG Europe Wed, 09 Sep 2020 10:00:00 GMT Nanovectors in radiotherapy: how to optimize the polymer crown of gold nanoparticles https://www.cea.fr/drf/english/Pages/News/Scientific-results/2020/nanovectors-in-radiotherapy-how-to-optimize-the-polymer-crown-of-gold-nanoparticles.aspx With the help of X-ray and neutron scattering measurements of model nanoparticles, a team from the Iramis is developing recommendations for the use of functionalized gold nanoparticles in anticancer therapy: the polymer crown must be made from hydrophobic, positively charged monomers. Micro-nanotechnologies ; Nanomedicine ; Diagnosis and innovative treatment ; Chemistry general public ; Journalists ; Researchers Iramis Scientific result Fri, 28 Aug 2020 10:00:00 GMT Anisotropic functionalization of gold nanoparticles assisted by surface plasmons https://www.cea.fr/drf/english/Pages/News/Scientific-results/2020/Anisotropic-functionalization-of-gold-nanoparticles-assisted-by-surface-plasmons.aspx Researchers at the CEA-Iramis and their partners have locally grafted organic molecules onto gold nanoparticles, using two photopolymerization steps. This new flexible functionalization technique can be used for applications ranging from biosensing to photonics. Photonics ; Micro-nanotechnologies ; Chemistry ; Laser ; Diagnosis ; Innovation for industry general public ; Journalists ; Researchers Iramis Scientific result Wed, 05 Aug 2020 10:00:00 GMT Cooling electron spins with microwave photons https://www.cea.fr/drf/english/Pages/News/Scientific-results/2020/cooling-electron-spins-with-microwave-photons.aspx A team from the CEA-Iramis has shown that it is possible to bring an ensemble of electron spins to a temperature lower than that of the supporting crystal, thanks to their being coupled to an electromagnetic field within a resonant microwave cavity. This patented discovery greatly improves the detection of EPR (Electron Paramagnetic Resonance) and NMR (Nuclear Magnetic Resonance) signals. Spintronics ; Quantum Physics general public ; Journalists ; Researchers Iramis Scientific result Mon, 15 Jun 2020 10:00:00 GMT Towards efficient and mercury-free LEDs https://www.cea.fr/drf/english/Pages/News/Scientific-results/2020/towards-efficient-and-mercury-free-leds.aspx At a time when mercury is becoming a highly toxic material for the nervous system, researchers at the Irig [collaboration] are making significant progress towards efficient, mercury-free, deep-ultraviolet light-emitting diodes used in water and air treatment, disinfection, counterfeit detection, etc... Photonics general public ; Journalists ; Researchers IRIG Scientific result Wed, 20 May 2020 10:00:00 GMT Controlling and detecting spin currents using ferroelectricity https://www.cea.fr/drf/english/Pages/News/Scientific-results/2020/controlling-and-detecting-spin-currents-using-ferroelectricity.aspx Researchers from the CEA-Irig and the “Unité mixte de physique” CNRS-Thales have proposed a new spintronic approach based on ferroelectricity. For the first time, this approach allows spin currents to be manipulated using non-magnetic interfaces controlled by electric fields. The result: the electrical consumption of non-volatile spintronic devices can potentially be reduced by a factor of one thousand! Spintronics ; Micro-nanotechnologies general public ; Journalists ; Researchers IRIG Scientific result Wed, 22 Apr 2020 10:00:00 GMT Fractional charge carriers make some noise with photons! https://www.cea.fr/drf/english/Pages/News/Scientific-results/2019/fractional-charge-carriers--make-some-noise-with-photons.aspx Researchers from CEA-Iramis have designed a new experimental method using microwave photons that brings additional proof that the electrical charge of carriers may amount to a third or a fifth of the elementary charge of the electron. Moreover, the experiment shows that these fractionally charged carriers (called “anyons”) interact with microwave photons and can therefore be manipulated. This discovery is the first step towards the study of anyons’ quantum and statistical properties. Fundamental Research ; Micro-nanoelectronics ; Quantum Physics general public ; Journalists ; Researchers Iramis Scientific result Mon, 29 Apr 2019 13:03:55 GMT Superconductivity: let’s shake correlated electrons! https://www.cea.fr/drf/english/Pages/News/Scientific-results/2019/superconductivity-lets-shake-correlated-electrons.aspx Theoretical physicists from the IPhT designed a model of a system of highly correlated electrons subjected to a periodic disturbance. This model could be the first step towards the creation of superconducting materials maintaining room temperature, illuminated by a femtosecond laser… Fundamental Research ; Quantum Physics ; Theoretical physics Journalists ; Researchers ; general public IPhT Scientific result Mon, 08 Apr 2019 10:00:00 GMT A little bit of disorder in spin ice https://www.cea.fr/drf/english/Pages/News/Scientific-results/2018/A-little-bit-of-disorder-in-spin-ice.aspx “Spin ice” refers to a ferromagnetic material at low temperature exhibiting a promising quantum behavior. Using neutron scattering experiments and theoretical models, a collaboration involving the Iramis has just established how a tiny chemical disorder in this material can reveal a spectrum of magnetic fluctuations. This is a fundamental step in realizing and controlling the properties of a quantum spin ice. Spintronics ; Materials Researchers ; general public ; Journalists Iramis Scientific result Tue, 27 Mar 2018 10:00:00 GMT Elucidating the surface state of CuInS2 nanocrystals https://www.cea.fr/drf/english/Pages/News/Scientific-results/2018/Elucidating-the-surface-state-of-CuInS2-nanocrystals.aspx Several nuclear magnetic resonance (NMR) techniques have enabled chemists from the Inac to elucidate the surface state of ternary chalcogenide nanocrystals (CuInS2) dispersed in an organic solvent. This is a key step in providing these nano-objects with new functionalities for energy conversion, photonics and biological analysis. Photonics Researchers ; general public ; Journalists Inac Scientific result Mon, 12 Mar 2018 11:00:00 GMT “Lateral” geometries, or spintronics 2.0 https://www.cea.fr/drf/english/Pages/News/Scientific-results/2018/Lateral-geometries-or-spintronics-2.0.aspx Thanks to progress in lithography techniques, new so-called “lateral” architectures are emerging in spintronics. Far more versatile and just as powerful as the current devices, they are opening up important prospects for memory and logic applications. It’s time to get creative! Spintronics Researchers ; general public ; Journalists Inac Scientific result Thu, 15 Feb 2018 11:00:00 GMT A molecular Swiss army knife https://www.cea.fr/drf/english/Pages/News/Scientific-results/2018/A-molecular-Swiss-army-knife.aspx By combining an atom and a molecule on a surface with the help of a microscope using the tunnel effect, it is possible to construct a nano-object whose electronic and mechanical properties can be modulated according to the relative positions of the atom and the molecule. The diversity of properties obtained demonstrates the promising potential of this “trapping chemistry”. Micro-nanotechnologies Researchers ; general public ; Journalists Iramis Scientific result Mon, 12 Feb 2018 11:00:00 GMT A boost for magnetic tunnel junctions! https://www.cea.fr/drf/english/Pages/News/Scientific-results/2018/A-boost-for-magnetic-tunnel-junctions.aspx Les propriétés magnétiques et électriques des jonctions tunnel magnétiques ont pu être améliorées significativement en insérant des couches de métal réfractaire (tungstène) dans les empilements. Cette avancée ouvre de belles perspectives aux mémoires magnétiques MRAM composées de telles jonctions et qui rentrent en production de volume. Spintronics Researchers ; general public ; Journalists Inac Scientific result Mon, 05 Feb 2018 11:00:00 GMT Spice : Heralding in Universal Memory https://www.cea.fr/drf/english/Pages/News/Institutional-news/2018/Spice-Heralding-in-Universal-Memory.aspx Using optical rather than electrical technology to write to MRAM magnetic storage media would unlock a thousandfold speed increase and slash power consumption by a factor of 100. Spice aims to tackle this challenge and promote the use of non-volatile memory near processor cores. A computing revolution in perspective... Cross-functional disciplines ; Computing ; Electronics ; Spintronics ; Micro-nanotechnologies Journalists ; general public ; Researchers Grenoble News ; Newsletter ; CEA Research News ; European & international partnerships magnetization;tunnel-junction;optomagnetism;MRAM;H2020;excellent science; Fri, 02 Feb 2018 17:00:00 GMT Measuring MOS quantum bits by radiofrequency reflectometry https://www.cea.fr/drf/english/Pages/News/Scientific-results/2017/measuring-mos-quantum-bits-by-radiofrequency-reflectometry.aspx A team from the Inac has proposed a new method to measure a semiconductor quantum dot by radiofrequency reflectometry. This method, which utilizes MOS technology on silicon, can easily be extrapolated on a larger scale to produce dense quantum bit architectures. Micro-nanoelectronics Researchers ; general public ; Journalists Inac Scientific result Tue, 05 Dec 2017 11:00:00 GMT Quantum Well Nanotubes to Emit in the UV Range https://www.cea.fr/drf/english/Pages/News/Scientific-results/2017/quantum-well-nanotubes-to-emit-in-the-uv-range.aspx A collaboration led by INAC has produced GaN/InAlN quantum well nanotubes with good light emission properties in the UV range. They will be included in a polymer to obtain flexible LEDs. Photonics Researchers ; general public ; Journalists Inac Scientific result nanofils;LED flexible;source UV;Puits quantiques;GaN;nanotubes; Mon, 04 Dec 2017 15:12:15 GMT A photoreceptor at the end of a nanowire! https://www.cea.fr/drf/english/Pages/News/Scientific-results/2017/a-photoreceptor-at-the-end-of-a-nanowire.aspx Researchers from the Inac have developed new approaches to UV and infrared detection using individual gallium nitride (GaN) nanowires. In particular, they produced the first nanowire photodetector using electronic transitions within the conduction band of a semiconducting heterostructure. Photonics Researchers ; general public ; Journalists Inac Scientific result Fri, 01 Dec 2017 11:00:00 GMT A skyrmion switch https://www.cea.fr/drf/english/Pages/News/Scientific-results/2017/a-skyrmion-switch.aspx “Magnetic skyrmions” are currently emerging as promising nanoscale bits in spintronics, e.g. for dense, energy-efficient information storage or high-performance logical operations. Researchers from the Inac and the Institut Néel in Grenoble have managed to create and erase microscale skyrmions using an electric field. Spintronics Researchers ; general public ; Journalists Inac Scientific result Thu, 16 Nov 2017 11:00:00 GMT Stolen Images from a Very Discreet Magnetic Order https://www.cea.fr/drf/english/Pages/News/Scientific-results/2017/stolen-images-from-a-very-discreet-magnetic-order.aspx Physicists from IRAMIS were successful in producing images of the antiferromagnetic order in bismuth ferrite by generating a second harmonic using a femtosecond laser. This result is the first step towards the control of these materials which are seen as promising for data storage applications. Micro-nanoelectronics Researchers ; general public ; Journalists Iramis Scientific result Thu, 26 Oct 2017 10:00:00 GMT Large Spin Accumulations in Bulk Germanium by Spin-Hall Voltage https://www.cea.fr/drf/english/Pages/News/Scientific-results/2017/large-spin-accumulations-in-bulk-germanium-by-spin-hall-voltage.aspx Researchers from INAC have managed to accumulate high spin densities in germanium over long distances. This result opens prospects for the production of a multi-terminal spintronic device where different spin voltages can be used as inputs for magneto-logic gates on germanium. Spintronics Researchers ; general public ; Journalists Inac Scientific result Tue, 19 Sep 2017 10:00:00 GMT Synchrotron: the Optical and Crystallographic Cision of a GaN https://www.cea.fr/drf/english/Pages/News/Scientific-results/2017/synchrotron-the-optical-and-crystallographic-cision-of-a-gan.aspx Synchrotron analysis combining photo-emission and X-ray fluorescence is a remarkable tool to study InGaN/GaN quantum multiwires integrated in blue GaN wire LEDs. Using this approach, scientists from INAC have broadened their understanding of how to optimize and control the growth conditions of the multiwells surrounding GaN wires. Micro-nanotechnologies Researchers ; general public ; Journalists Inac Scientific result fil de GaN;LED bleue;photoluminescence X;fluorescence X;InGaN;GaN;synchrotron;Multipuits quantiques; Wed, 13 Sep 2017 10:00:00 GMT A Promising Process to Manufacture Nanoporous Graphene https://www.cea.fr/drf/english/Pages/News/Scientific-results/2017/a-promising-process-to-manufacture-nanoporous-graphene.aspx A European collaboration involving IRAMIS has described the fabrication of nanoporous graphene sheets that are both robust and easy to handle. The process, which can be used for large area fabrication, uses a copper/graphene/polymer 'sandwich' exposed to heavy swift-ion beam irradiation. It paves the way for numerous applications, including filtration for DNA sequencing and desalination of seawater. Micro-nanotechnologies Researchers ; general public ; Journalists Iramis Scientific result séquençage;nanofiltration;électronique;ions lourds;polymère;ADN;transistor à effet de champ;graphène;nanoporeux;capteurs;dessalement; Mon, 21 Aug 2017 10:00:00 GMT A Single Photon Emitter Detects the Movement of an Oscillator https://www.cea.fr/drf/english/Pages/News/Scientific-results/2017/a-single-photon-emitter-detects-the-movement-of-an-oscillator.aspx A team of scientists has managed to couple a semiconductor quantum dot and a vibrating wire. The quantum dot detects the mechanical oscillations of the wire with high sensitivity. This work, completed as part of a collaboration between the University of Basel and INAC, opens new perspectives for the development of original sensors and for fundamental studies. Photonics Researchers ; general public ; Journalists Inac Scientific result fil vibrant;oscillateur mécanique;optique quantique;Nanophotonique;photon unique; Mon, 17 Jul 2017 10:00:00 GMT LASERLAB-EUROPE, a broad-ranging cooperation on ultra-light and short-pulse laser infrastructure https://www.cea.fr/drf/english/Pages/News/Institutional-news/2017/LASERLAB-EUROPE-broad-ranging-cooperation-ultra-light-short-pulse-laser-infrastructure.aspx Within the framework of the LASERLAB-EUROPE project, CEA is working towards sharing and opening up laser and photonics infrastructure to European scientists. Today, Laserlab is an important tool for the development of laser metrology and laser-based instrumentation for a wide range of applications and societal needs in the fields of health, security, environment, etc. Laser ; Photonics ; Micro-nanotechnologies general public ; Journalists ; Researchers Iramis News ; Newsletter ; CEA Research News ; European & international partnerships femtoseconde;attoseconde;ultra-high intensity;metrology;excellent science; Thu, 15 Jun 2017 14:00:00 GMT How to Produce Unidirectional Spin Waves https://www.cea.fr/drf/english/Pages/News/Scientific-results/2017/how-to-produce-unidirectional-spin-waves.aspx Researchers from INAC have modeled spin wave sources using base metals. They showed that the presence of the interaction called Dzyaloshinskii-Moriya in these materials, combined with a judicious choice of system geometry, allows for the obtaining of a spin wave source that is unidirectional. Spintronics ; New technologies Researchers ; general public ; Journalists Inac Scientific result spin;spintronique;source unidirectionnelle d'onde de spin;ondes de spin; Tue, 06 Jun 2017 10:00:00 GMT Mapping Quantum Emitters at the Nanometric Scale https://www.cea.fr/drf/english/Pages/News/Scientific-results/2017/mapping-quantum-emitters-at-the-nanometric-scale.aspx Scientists from INAC and Institut Néel have developed a new technique to precisely map the position of semiconductor quantum dots integrated in a photonic structure. Photonics Researchers ; general public ; Journalists Inac Scientific result photonique;émetteur nanométrique;boîte quantique;auto-assemblage; Mon, 29 May 2017 10:00:00 GMT The Strange Negative Magnetoresistance of MoSe2 https://www.cea.fr/drf/english/Pages/News/Scientific-results/2017/the-strange-negative-magnetoresistance-of-mose2.aspx A team from INAC has produced and characterized, for the first time, a layer of molybdenum diselenide (MoSe2) with a triatomic thickness on an extended surface of about 1 cm². Electric conduction is more elaborate than in a classic semiconductor (“Mott gaps”) and decreases in the presence of a magnetic field. These properties provide the compounds of the MoSe2 family with a high potential for electronics, optoelectronics, and valleytronics (named after the property of electrons called the “valley index”). Tools & research instruments ; Simulation & modelling ; Micro-nanoelectronics Scientific result Tue, 14 Mar 2017 11:00:00 GMT Detecting and Producing a Spin Current in Germanium https://www.cea.fr/drf/english/Pages/News/Scientific-results/2017/detecting-and-producing-a-spin-current-in-germanium.aspx A team from INAC has successfully carried out the conversion of a spin current into a charge current at the interface between iron and germanium, thanks to spin–orbit coupling. According to the reciprocity principle, the reverse process is also possible. This result implies that the generation and detection of a spin current are a priori feasible with current CMOS technology. It constitutes a first step toward a spin transistor relying entirely on spin–orbit coupling. Tools & research instruments ; Micro-nanoelectronics general public ; Journalists ; Researchers Inac Scientific result Wed, 01 Mar 2017 11:00:00 GMT FET Proactive 2016: IRAMIS to Coordinate the MAGENTA Project https://www.cea.fr/drf/english/Pages/News/Institutional-news/2017/fet-proactive-2016-iramis-to-coordinate-the-magenta-project.aspx The MAGENTA project, one of twelve projects selected by the European Commission from the category “Proactive Future and Emerging Technologies 2016,” will be coordinated by a team from IRAMIS. The project’s aim is to develop thermoelectric materials intended to recover waste heat, notably in the automotive and microelectronic sectors. The project’s official kickoff took place in Paris on January 23 and 24, 2017. Tools & research instruments ; Micro-nanotechnologies ; Materials general public ; Journalists ; Researchers Iramis Highlight Fri, 03 Feb 2017 11:00:00 GMT An Optomecanic Mapping of the Magnetic Field https://www.cea.fr/drf/english/Pages/News/Scientific-results/2017/optomecanic-mapping-of-the-magnetic-field.aspx Scientists from INAC have created an original system for mapping magnetic fields at a micronic scale, in a quantitative manner, and in real time. Its principle consists in observing the deformation across a field of thin, magnetic, light-reflecting “nanoribbons”. Micro-nanotechnologies ; Micro-nanoelectronics general public ; Journalists ; Researchers Inac Scientific result Mon, 30 Jan 2017 11:00:00 GMT