| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Mkhoyan, K. Andre
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (17/17 displayed)
- 2023Optical Properties of Electrochemically Gated La 1− xSr xCoO 3−δ as a Topotactic Phase-Change Materialcitations
- 2023Anomalous strain relaxation and its impact on the valence-driven spin-state/metal-insulator transition in epitaxial (Pr1−yYy)1−xCaxCoO3−δcitations
- 2023Spin Hall conductivity in Bi$_{1-x}$Sb$_x$ as an experimental test of bulk-boundary correspondence
- 2021Spin and Charge Interconversion in Dirac-Semimetal Thin Filmscitations
- 2020Layer Dependence of Dielectric Response and Water-Enhanced Ambient Degradation of Highly Anisotropic Black Ascitations
- 2020Ambipolar transport in van der Waals black arsenic field effect transistorscitations
- 2020Plasmonic nanocomposites of zinc oxide and titanium nitridecitations
- 2020Self-Assembled Periodic Nanostructures Using Martensitic Phase Transformationscitations
- 2020Thermal transport in ZnO nanocrystal networks synthesized by nonthermal plasmacitations
- 2018Room-temperature high spin–orbit torque due to quantum confinement in sputtered BixSe(1–x) filmscitations
- 2015Giant Spin Pumping and Inverse Spin Hall Effect in the Presence of Surface and Bulk Spin-Orbit Coupling of Topological Insulator Bi2Se3citations
- 2015Nonequilibrium-Plasma-Synthesized ZnO Nanocrystals with Plasmon Resonance Tunable via Al Doping and Quantum Confinementcitations
- 2015Hybrid molecular beam epitaxy for the growth of stoichiometric BaSnO3citations
- 2012Sputter deposition of semicrystalline tin dioxide filmscitations
- 2012Improving the damp-heat stability of copper indium gallium diselenide solar cells with a semicrystalline tin dioxide overlayercitations
- 2010Orientation and morphological evolution of catalyst nanoparticles during carbon nanotube growthcitations
- 2010Effect of hydrogen on catalyst nanoparticles in carbon nanotube growthcitations
Places of action
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article
Spin Hall conductivity in Bi$_{1-x}$Sb$_x$ as an experimental test of bulk-boundary correspondence
Abstract
Bulk-boundary correspondence is a foundational principle underlying the electronic band structure and physical behavior of topological quantum materials. Although it has been rigorously tested in topological systems where the physical properties involve charge currents, it remains unclear whether bulk-boundary correspondence should also hold for non-conserved spin currents. We study charge-to-spin conversion in a canonical topological insulator, Bi$_{1-x}$Sb$_x$, to address this fundamentally unresolved question. We use spin-torque ferromagnetic resonance measurements to accurately probe the charge-to-spin conversion efficiency in epitaxial Bi$_{1-x}$Sb$_x$~thin films of high structural quality spanning the entire range of composition, including both trivial and topological band structures, as verified using { in vacuo} angle-resolved photoemission spectroscopy. From these measurements, we deduce the effective spin Hall conductivity (SHC) and find excellent agreement with the values predicted by tight-binding calculations for the intrinsic SHC of the bulk bands. These results provide strong evidence that the strong spin-orbit entanglement of bulk states well below the Fermi energy connects directly to the SHC in epitaxial Bi$_{1-x}$Sb$_x$~films interfaced with a metallic ferromagnet. The excellent agreement between theory and experiment points to the generic value of analyses focused entirely on bulk properties, even for topological systems involving non-conserved spin currents.