Explanipedia

Efficient integration of self-assembled organic monolayer tunnel barriers in large area pinhole-free magnetic tunnel junctions Open

Soraya Ababou‐Girard, Philippe Schieffer, F. Solal, Pascal Turban · 2025

Magneto-transport properties in hybrid magnetic tunnel junctions (MTJs) integrating self-assembled monolayers (SAMs) as tunnel barriers are critically influenced by spinterface effects, which arise from the electronic properties at ferroma…

Photoelectron diffraction of twisted bilayer graphene Open

Sylvain Tricot, Hiroshi Ikeda, Hulerich Camel Tchouekem, J. C. Le Breton, Satoshi Yasuda , et al. · 2025

Photoelectron diffraction of twisted bilayer graphene Open

Sylvain Tricot, Hiroshi Ikeda, Hulerich Camel Tchouekem, J. Breton, Satoshi Yasuda , et al. · 2024

Photoelectron diffraction (PED) is a powerful spectroscopic technique that combines elemental resolution with a high sensitivity to the local atomic arrangement at crystal surfaces, thus providing unique fingerprints of selected atomic sit…

Multiscale approach for modeling magnetization properties of inhomogeneous ultrathin magnetic layers Open

Julien Mordret, Jean‐Christophe Le Breton, Gabriel Delhaye, Bruno Lépine, Philippe Schieffer , et al. · 2024

We report on spin atomistic calculations used to model static and dynamic\nmagnetic properties of inhomogeneous ultrathin iron films. Active magnetic\nlayers in next-generation spintronic devices are becoming so thin that they\nexhibit som…

Voltage‐Driven Fluorine Motion for Novel Organic Spintronic Memristor Open

Abir Nachawaty, Tongxin Chen, Fatima Ibrahim, Yuchen Wang, Ya-Fei Hao , et al. · 2024

Integrating tunneling magnetoresistance (TMR) effect in memristors is a long‐term aspiration because it allows to realize multifunctional devices, such as multi‐state memory and tunable plasticity for synaptic function. However, the report…

Carrier-Density Control of the Quantum-Confined Charge Density Wave Open

T. Jaouen, Aki Pulkkinen, M. Rumo, Geoffroy Kremer, Björn Salzmann , et al. · 2023

Using angle-resolved photoemission spectroscopy, combined with first principle and coupled self-consistent Poisson-Schrödinger calculations, we demonstrate that potassium (K) atoms adsorbed on the low-temperature phase of 1T-TiSe_{2} induc…

Carrier-Density Control of the Quantum-Confined 1$T$-TiSe$_2$ Charge-Density-Wave Open

T. Jaouen, Aki Pulkkinen, M. Rumo, Geoffroy Kremer, Björn Salzmann , et al. · 2023

Using angle-resolved photoemission spectroscopy, combined with first principle and coupled self-consistent Poisson-Schrödinger calculations, we demonstrate that potassium (K) atoms adsorbed on the low-temperature phase of 1$T$-TiSe$_2$ ind…

Study of MoS2 Deposited by ALD on c-Si, Towards the Development of MoS2/c-Si Heterojunction Photovoltaics Open

Bienlo Flora Christine Zerbo, M. Modreanu, Ian M. Povey, Jun Lin, A. Létoublon , et al. · 2022

Silicon-based heterojunction (SHJ) solar cells demonstrate high efficiencies over their homojunction counterparts, revealing the potential of such technologies. We present here the first steps towards the development of molybdenum disulfid…

Luminescence in undoped and Nb-doped SrTiO3 crystals: Bulk and surface emission Open

Shabnam Dadgostar, Jose Luis Pura Ruiz, J. Serrano, Bruno Lépine, Philippe Schieffer , et al. · 2022

Producción Científica

Energy dependence of interference phenomena in the forward-scattering regime of photoelectron diffraction Open

Sylvain Tricot, T. Jaouen, D. Sébilleau, Philippe Schieffer · 2022

Simple renormalization schemes for multiple scattering series expansions Open

Aika Takatsu, Sylvain Tricot, Philippe Schieffer, K M Dunseath, Mariko Terao-Dunseath , et al. · 2022

Renormalization schemes for improving the convergence of multiple scattering series expansions are studied. Numerical tests on a small Cu(111) cluster show that convergence rates can double or even that a divergent series can eventually co…

Epitaxial III–V/Si Vertical Heterostructures with Hybrid 2D‐Semimetal/Semiconductor Ambipolar and Photoactive Properties Open

Lipin Chen, Yoan Léger, Gabriel Loget, Mekan Piriyev, Imen Jadli , et al. · 2021

Hybrid materials taking advantage of the different physical properties of materials are highly attractive for numerous applications in today's science and technology. Here, it is demonstrated that epitaxial bi‐domain III–V/Si are hybrid st…

Origin of weak Fermi level pinning at the graphene/silicon interface Open

Jules Courtin, Sylvain Tricot, Gabriel Delhaye, Pascal Turban, Bruno Lépine , et al. · 2020

International audience

Schottky barrier formation at the(001) interface: Influence of oxygen vacancies and layer oxidation Open

Rémi Arras, Julien Gosteau, Sylvain Tricot, Philippe Schieffer · 2020

International audience

Reduction of Schottky Barrier Height at Graphene/Germanium Interface with Surface Passivation Open

Jules Courtin, Alain Moréac, Gabriel Delhaye, Bruno Lépine, Sylvain Tricot , et al. · 2019

Fermi level pinning at metal/semiconductor interfaces forbids a total control over the Schottky barrier height. 2D materials may be an interesting route to circumvent this problem. As they weakly interact with their substrate through Van d…

A low Schottky barrier height and transport mechanism in gold–graphene–silicon (001) heterojunctions Open

Jules Courtin, Sylvain Le Gall, Pascal Chrétien, Alain Moréac, Gabriel Delhaye , et al. · 2019

ResiScope mapping showing the strong reduction of resistance induced by a graphene sheet inserted between silicon and gold.

Evidence of Pure Spin-Current Generated by Spin Pumping in Interface-Localized States in Hybrid Metal–Silicon–Metal Vertical Structures Open

Carolina Cerqueira, Jian Qin, Huong Dang, Abdelhak Djeffal, Jean-Christophe Le Breton , et al. · 2018

Due to the difficulty of growing high-quality semiconductors on ferromagnetic metals, the study of spin diffusion transport in Si was limited to lateral geometry devices. In this work, by using an ultrahigh-vacuum wafer-bonding technique, …

Bias Dependence of the Electrical Spin Injection into GaAs from Injectors with Different MgO Growth Processes Open

P. Barate, Shiheng Liang, T. T. Zhang, Julien Frougier, Bo Xu , et al. · 2017

International audience

Band Bending in Mg-Colored and O<sub>2</sub>-Activated Ultrathin MgO(001) Films Open

T. Jaouen, B. Hildebrand, P. Aebi, Gabriel Delhaye, Sylvain Tricot , et al. · 2017

Ultrathin MgO films grown on Ag(001) have been investigated using X-ray and ultraviolet photoemission spectroscopies for oxide films successively exposed to Mg and O2 flux. Studying work functions and layer-resolved Auger shifts allows us …

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