A5088795815- Graphene research and applications
- Quantum and electron transport phenomena
- Magnetic properties of thin films
- 2D Materials and Applications
- Advanced Memory and Neural Computing
- Characterization and Applications of Magnetic Nanoparticles
- Magnetic Properties and Applications
- Multiferroics and related materials
- Theoretical and Computational Physics
- Magnetic and transport properties of perovskites and related materials
- Magneto-Optical Properties and Applications
- Atomic and Subatomic Physics Research
- Physics of Superconductivity and Magnetism
- Electronic and Structural Properties of Oxides
- Molecular Junctions and Nanostructures
- Magnetic Field Sensors Techniques
- Heusler alloys: electronic and magnetic properties
- Quantum, superfluid, helium dynamics
- Ferroelectric and Piezoelectric Materials
- Organic and Molecular Conductors Research
- Topological Materials and Phenomena
- Advancements in Battery Materials
- Nonlinear Dynamics and Pattern Formation
University of Oxford
2021-2024
CIC nanoGUNE
2018-2024
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2012-2022
CEA Grenoble
2012-2022
Spintronique et Technologie des Composants
2012-2022
Ikerbasque
2020
Institut Nanosciences et Cryogénie
2014-2015
Université Grenoble Alpes
2015
Institut polytechnique de Grenoble
2014
Université Joseph Fourier
2014
Graphene is an excellent material for long-distance spin transport but allows little manipulation. Transition-metal dichalcogenides imprint their strong spin–orbit coupling into graphene via the proximity effect, and it has been predicted that efficient spin-to-charge conversion due to Hall Rashba–Edelstein effects could be achieved. Here, by combining probes with ferromagnetic electrodes, we unambiguously demonstrate experimentally effect in induced MoS2 varying temperatures up room...
The nucleation of reversed magnetic domains in Pt/Co/AlO$_{x}$ microstructures with perpendicular anisotropy was studied experimentally the presence an in-plane field. For large enough field, observed preferentially at edge sample normal to this position which takes place depend a chiral way on initial magnetization and applied field directions. An explanation these results is proposed, based existence sizable Dzyaloshinskii-Moriya interaction sample. Another consequence that energy domain...
Efficient and versatile spin-to-charge current conversion is crucial for the development of spintronic applications, which strongly rely on ability to electrically generate detect spin currents. In this context, Hall effect has been widely studied in heavy metals with strong spin–orbit coupling. While high crystal symmetry these materials limits orthogonal configuration, unusual configurations are expected low-symmetry transition-metal dichalcogenide semimetals, could add flexibility...
The proximity effect opens ways to transfer properties from one material into another and is especially important in two-dimensional (2D) materials. In van der Waals heterostructures, transition metal dichalcogenides (TMDs) can be used enhance the spin–orbit coupling of graphene leading prediction gate controllable spin-to-charge conversion (SCC). Here, we report for first time quantify spin Hall (SHE) proximitized with WSe2 up room temperature. Unlike other graphene/TMD devices, sole SCC...
Spin-charge interconversion phenomena are important ingredients for the development of post-CMOS spin-based logic and magnetic memory technologies. Device design is often limited, though, by fact that in most systems conversion occurs only if charge current, spin polarization mutually orthogonal. The authors find graphene/MoTe${}_{2}$ van der Waals heterostructures, currents injected any spatial direction contribute to same particular spin-polarization direction, thanks a combination strong...
Abstract A charge density wave (CDW) represents an exotic state in which electrons are arranged a long‐range ordered pattern low‐dimensional materials. Although the understanding of fundamental character CDW is enriched after extensive studies, its practical application remains limited. Here, unprecedented demonstration tunable charge‐spin interconversion (CSI) graphene/1T‐TaS 2 van der Waals heterostructures shown by manipulating distinct phases 1T‐TaS . Whereas CSI from spins polarized all...
The conversion of spin currents polarized in different directions into charge is a keystone for novel spintronic devices. Van der Waals heterostructures with tailored symmetry are very appealing platform such goal. Here, by performing nonlocal precession experiments, we demonstrate the spin-to-charge (SCC) spins oriented all three (x, y, and z). By analyzing magnitude temperature dependence signal configurations, argue that SCC components measured likely due to spin-orbit proximity broken at...
Spin-orbit coupling in graphene can be enhanced by chemical functionalization, adatom decoration, or proximity with a van der Waals material. As it is expected that such enhancement gives rise to sizable spin Hall effect, spin-to-charge current conversion phenomenon of technological relevance, has sparked wide research interest. However, only been measured graphene/transition-metal dichalcogenide heterostructures limited scalability. Here, we experimentally demonstrate the effect up room...
Graphene is a light material for long-distance spin transport due to its low spin-orbit coupling, which at the same time main drawback exhibiting sizable Hall effect. Decoration by atoms has been predicted enhance angle in graphene while retaining long diffusion length. Here, we combine metal oxide (oxidized Cu) with induce Its efficiency, given product of and length, can be tuned Fermi level position, maximum (1.8 ± 0.6 nm 100 K) around charge neutrality point. This all-light-element...
Abstract Understanding spin physics in graphene is crucial for developing future two-dimensional spintronic devices. Recent studies show that efficient spin-to-charge conversions (SCCs) via either the inverse Hall effect or Rashba–Edelstein (IREE) can be achieved by proximity with an adjacent spin–orbit coupling (SOC) material. Lateral valve devices, made up of a bar and ferromagnets, are best suited such studies. Here, we report signals mimicking IREE measured pristine possessing negligible...
Controlling BiFeO3 (BFO)/ferromagnet (FM) interfacial coupling appears crucial for electrical control of spintronic devices using this multiferroic. Here, we analyse the magnetic behaviour exchange-biased epitaxial-BiFeO3/FM bilayers with in-plane or out-of-plane anisotropies. We report bimodal distributions blocking temperatures similar to those polycrystalline-antiferromagnet (AF)/FM bilayers. The high-temperature contribution depends on FM anisotropy direction and is likely related...
Friction plays an essential role in most physical processes that we experience our everyday life. Examples range from ability to walk or swim, setting boundaries of speed and fuel efficiency moving vehicles. In magnetic systems, the displacement chiral domain walls (DW) skyrmions (SK) by Spin Orbit Torques (SOT), is also prone friction. Chiral damping (αc), dissipative counterpart Dzyaloshinskii Moriya Interaction (DMI), a central these dynamics. Despite experimental observation, numerous...
One of the key requirements for efficient organic-electronic devices is creation a negligible energy barrier carrier injection at metal-organic interface. Here, graphene-organic interface with an almost demonstrated in high-performance hybrid heterojunction device. The gate-tunable current-voltage characteristics show that electronic transport can be tuned from interface-limited to bulk-dominated regime by lowering barrier. N-type transistors PTCDI-C8 organic thin film as active layer...
Multi-directional spin-to-charge conversion—in which spin polarizations with different orientations can be converted into a charge current in the same direction—has been demonstrated low-symmetry materials and interfaces. This is possible because, these systems, conversion occur unconventional configurations current, polarization do not need to mutually orthogonal. Here, we explore, low temperature regime, heterostructures of graphene 1T' phase MoTe2. First, observe emergence for...
Understanding the high-frequency transport characteristics of magnetic tunnel junctions (MTJs) is crucial for development fast-operating spintronics memories and radio frequency devices. Here, we present study frequency-dependent capacitive current effect in CoFeB/MgO-based MTJs its influence on magnetization dynamics using time-resolved magneto-optical Kerr technique. In our device operating at gigahertz frequencies, find a large displacement order mA's, which does not break barrier MTJ....
Understanding the high-frequency transport characteristics of magnetic tunnel junctions (MTJs) is crucial for development fast-operating spintronics memories and radio frequency devices. Here, we present study a frequency-dependent capacitive current effect in <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline" overflow="scroll"><a:mrow><a:mi>Co</a:mi><a:mi>Fe</a:mi><a:mi mathvariant="normal">B</a:mi></a:mrow><a:mo>/</a:mo><a:mrow><a:mi>Mg</a:mi><a:mi...
The Dzyaloshinskii-Moriya interaction is responsible for chiral magnetic textures (skyrmions, spin spiral structures, …) in systems with structural inversion asymmetry and high spin-orbit coupling. It has been shown that the domain wall (DW) dynamics such materials can be explained by DWs (partly or fully) Néel structure, whose stability derives from an interfacial DMI [1]. In this work, we show not only effect inducing demonstrate existence of a damping [2]. This result supported study...