| Autor: |
Derunova, E., Sun, Y., Felser, C., Parkin, S. S. P., Yan, B., Ali, M. N. |
| Rok vydání: |
2018 |
| Předmět: |
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| Zdroj: |
Science Advances, 05 Apr 2019, Vol. 5 No. 4 |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1126/sciadv.aav8575 |
| Popis: |
The spin Hall effect (SHE) is the conversion of charge current to spin current, and non-magnetic metals with large SHEs are extremely sought after for spintronic applications, but their rarity has stifled widespread use. Here we predict and explain the large intrinsic SHE in $\beta$-W and the A15 family of superconductors: W$_3$Ta, Ta$_3$Sb, and Cr$_3$Ir having spin hall conductivities (SHC) of -2250, -1400, and 1210 $\frac{\hbar}{e}(\Omega cm)^{-1}$, respectively. Combining concepts from topological physics with the dependence of the SHE on the spin Berry curvature (SBC) of the electronic bands, we propose a simple strategy to rapidly search for materials with large intrinsic SHEs based on the following ideas: high symmetry combined with heavy atoms gives rise to multiple Dirac-like crossings in the electronic structure, without sufficient symmetry protection these crossings gap due to spin orbit coupling (SOC), and gapped Dirac crossings create large spin Berry curvature. |
| Databáze: |
arXiv |
| Externí odkaz: |
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