Raphaël Salazar

Orbital and Spin Edelstein Effects in KTaO$_3$(110) Two-Dimensional Electron Gases

Hugo Witt, Aravind Raji, Srijani Mallik, Börge Göbel et autres

The orbital Edelstein effect converts an electric field into a non-equilibrium orbital polarization, opening new opportunities for orbitronics. Although signatures of the orbital Edelstein effect have been reported, its microscopic mechanisms and quantitative validation remain underexplored. Here, by directly linking the atomic …

Magnetically tunable symmetry-enforced nodal lines producing huge anomalous Hall conductivity in altermagnetic $α$-MnTe

Mathews Benny, Xujia Gong, Amar Fakhredine, Raphaël Salazar et autres

Altermagnetic $α$-MnTe exhibits huge anomalous Hall conductivity (AHC) up to room-temperature together with weak ferromagnetism arising from spin and orbital polarizations. We clarify the origin of the large value of the AHC by identifying two sets of distinct symmetry-enforced nodal lines in …

Orbital and Spin Edelstein Effects in KTaO 3 (110) Two‐Dimensional Electron Gases

Hugo Witt, Aravind Raji, Srijani Mallik, Börge Göbel et autres

ABSTRACT The orbital Edelstein effect converts an electric field into a non‐equilibrium orbital polarization, opening new opportunities for orbitronics. Although signatures of the orbital Edelstein effect have been reported, its microscopic mechanisms and quantitative validation remain underexplored. Here, by directly linking the …

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Two-dimensional to bulk crossover of the WSe2 electronic band structure

Raphaël Salazar, Matthieu Jamet, Céline Vergnaud, Aki Pulkkinen et autres

Abstract Transition metal dichalcogenides (TMDs) are layered materials obtained by stacking two-dimensional sheets weakly bonded by van der Waals interactions. In bulk TMD, band dispersions are observed in the direction normal to the sheet plane (z-direction) due to the hybridization of out-of-plane …

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Two-dimensional to bulk crossover of the WSe$_2$ electronic band structure

Raphaël Salazar, Matthieu Jamet, F. Bertran, Chiara Bigi et autres

Transition Metal Dichalcogenides (TMD) are layered materials obtained by stacking two-dimensional sheets weakly bonded by van der Waals interactions. In bulk TMD, band dispersions are observed in the direction normal to the sheet plane (z-direction) due to the hybridization of out-of-plane orbitals …

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Hétérostructures Ferroélectrique-Dichalcogénure de métaux de transition étudiées par spectroscopies d'électrons

Raphaël Salazar

Les dichalcogénures de métaux de transition (TMD) sont des matériaux lamellaires. La brique de base est un feuillet de formule générique MX₂, où M est un élément de transition et X un chalcogène (M = Mo, W…; X = S, Se, Te…) …

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Ferroelectrics-Transition Metal Dichalcogenide heterostructures studied by electron spectroscopies

Raphaël Salazar

Hétérostructures Ferroélectrique-Dichalcogénure de métaux de transition étudiées par spectroscopies d'électrons Les dichalcogénures de métaux de transition (TMD) sont des matériaux lamellaires. La brique de base est un feuillet de formule générique MX₂, où M est un élément de transition et X un …

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Visualizing Giant Ferroelectric Gating Effects in Large-Scale WSe2/BiFeO3 Heterostructures

Raphaël Salazar, Sara Varotto, Céline Vergnaud, Vincent Garcia et autres

Multilayers based on quantum materials (complex oxides, topological insulators, transition-metal dichalcogenides, etc.) have enabled the design of devices that could revolutionize microelectronics and optoelectronics. However, heterostructures incorporating quantum materials from different families remain scarce, while they would immensely broaden the range of …

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Visualizing giant ferroelectric gating effects in large-scale WSe$_2$/BiFeO$_3$ heterostructures

Raphaël Salazar, Sara Varotto, Céline Vergnaud, Vincent Garcia et autres

Multilayers based on quantum materials (complex oxides, topological insulators, transition-metal dichalcogenides, etc) have enabled the design of devices that could revolutionize microelectronics and optoelectronics. However, heterostructures incorporating quantum materials from different families remain scarce, while they would immensely broaden the range of …

Direct visualization of Rashba-split bands and spin/orbital-charge interconversion at KTaO3 interfaces

Sara Varotto, Annika Johansson, Börge Göbel, Luis Moreno Vicente‐Arche et autres

Abstract Rashba interfaces have emerged as promising platforms for spin-charge interconversion through the direct and inverse Edelstein effects. Notably, oxide-based two-dimensional electron gases display a large and gate-tunable conversion efficiency, as determined by transport measurements. However, a direct visualization of the Rashba-split …

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Direct visualization of Rashba-split bands and spin/orbital-charge interconversion at KTaO$_3$ interfaces

Sara Varotto, Annika Johansson, Börge Göbel, Luis Moreno Vicente‐Arche et autres

Rashba interfaces have emerged as promising platforms for spin-charge interconversion through the direct and inverse Edelstein effects. Notably, oxide-based two-dimensional electron gases (2DEGs) display a large and gate-tunable conversion efficiency, as determined by transport measurements. However, a direct visualization of the Rashba-split …

Spin–Charge Interconversion in KTaO3 2D Electron Gases

Luis Moreno Vicente‐Arche, Julien Bréhin, Sara Varotto, Maxen Cosset‐Chéneau et autres

Abstract Oxide interfaces exhibit a broad range of physical effects stemming from broken inversion symmetry. In particular, they can display non‐reciprocal phenomena when time reversal symmetry is also broken, e.g., by the application of a magnetic field. Examples include the direct and …

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