Rashba spin-splitting driven inverse spin Hall effect in MnBi2Te4
Abstract The inverse spin Hall effect is a critical method for detecting spin Hall conductivity. Unearthing the physical relationship between electronic structure and spin Hall conductivity is conducive to establishing an intrinsic link between microstructure and macroscopic phenomena. Here, we repo...
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| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Nature Portfolio
2025-01-01
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| Series: | Communications Physics |
| Online Access: | https://doi.org/10.1038/s42005-024-01932-y |
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| Summary: | Abstract The inverse spin Hall effect is a critical method for detecting spin Hall conductivity. Unearthing the physical relationship between electronic structure and spin Hall conductivity is conducive to establishing an intrinsic link between microstructure and macroscopic phenomena. Here, we report MnBi2Te4 as an ideal candidate: a stable, inversion symmetry-broken magnetic topological insulator for investigating the intrinsic correlation between spin Hall conductivity signal reversal and electronic structure. The valence band exhibits a significant Rashba spin splitting, with a magnitude reaching up to 4.61 eV/Å. We identify robust topological properties independent of Rashba and Lifshitz spin-splitting types. Moreover, transitioning the spin-splitting type not only widens the bulk band gap, enhancing the spin Hall conductivity plateau, but also triples the intrinsic spin Hall conductivity value. We propose the inverse spin Hall effect that is tunable by spin-splitting types, thereby advancing the research on the microscopic electronic mechanisms of spin current detection. |
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| ISSN: | 2399-3650 |