Orbital Hall Insulating Phase in Transition Metal Dichalcogenide Monolayers
| Autor: | R. B. Muniz, Tatiana G. Rappoport, Tarik P. Cysne, Alejandro Molina-Sanchez, Luis M. Canonico |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
Condensed Matter - Mesoscale and Nanoscale Physics Condensed matter physics FOS: Physical sciences 02 engineering and technology 021001 nanoscience & nanotechnology Coupling (probability) Condensed Matter::Mesoscopic Systems and Quantum Hall Effect 01 natural sciences Transition metal dichalcogenide monolayers 3. Good health symbols.namesake Dirac fermion Transition metal Hall effect Phase (matter) 0103 physical sciences Monolayer Mesoscale and Nanoscale Physics (cond-mat.mes-hall) symbols Condensed Matter::Strongly Correlated Electrons Astrophysics::Earth and Planetary Astrophysics 010306 general physics 0210 nano-technology Spin (physics) |
| DOI: | 10.48550/arxiv.2001.03592 |
| Popis: | We show that H-phase transition metal dichalcogenides (TMDs) monolayers such as MoS$_2$ and WSe$_2$, are orbital Hall insulators. They present very large orbital Hall conductivity plateaus in their semiconducting gap, where the spin Hall conductivity vanishes. Our results open the possibility of using TMDs for orbital current injection and orbital torque transfers that surpass their spin-counterparts in spin-orbitronics devices. The orbital Hall effect (OHE) in TMD monolayers occurs even in the absence of spin-orbit coupling. It can be linked to exotic momentum-space Dresselhaus-like orbital textures, analogous to the spin-momentum locking in 2D Dirac fermions that arise from a combination of orbital attributes and lattice symmetry. Comment: main text with 6 pages and 3 figures, and a Supplementary material |
| Databáze: | OpenAIRE |
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