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Giant intrinsic spin Hall effect in W(3)Ta and other A15 superconductors

The spin Hall effect (SHE) is the conversion of charge current to spin current, and nonmagnetic 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 β-W and the A15 family o...

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Autores principales: Derunova, E., Sun, Y., Felser, C., Parkin, S. S. P., Yan, B., Ali, M. N.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Association for the Advancement of Science 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6450695/
https://www.ncbi.nlm.nih.gov/pubmed/30972368
http://dx.doi.org/10.1126/sciadv.aav8575
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author Derunova, E.
Sun, Y.
Felser, C.
Parkin, S. S. P.
Yan, B.
Ali, M. N.
author_facet Derunova, E.
Sun, Y.
Felser, C.
Parkin, S. S. P.
Yan, B.
Ali, M. N.
author_sort Derunova, E.
collection PubMed
description The spin Hall effect (SHE) is the conversion of charge current to spin current, and nonmagnetic 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 β-W and the A15 family of superconductors: W(3)Ta, Ta(3)Sb, and Cr(3)Ir having spin Hall conductivities (SHCs) of −2250, −1400, and 1210 [Formula: see text] , 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; and gapped crossings create large SBC.
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spelling pubmed-64506952019-04-10 Giant intrinsic spin Hall effect in W(3)Ta and other A15 superconductors Derunova, E. Sun, Y. Felser, C. Parkin, S. S. P. Yan, B. Ali, M. N. Sci Adv Research Articles The spin Hall effect (SHE) is the conversion of charge current to spin current, and nonmagnetic 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 β-W and the A15 family of superconductors: W(3)Ta, Ta(3)Sb, and Cr(3)Ir having spin Hall conductivities (SHCs) of −2250, −1400, and 1210 [Formula: see text] , 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; and gapped crossings create large SBC. American Association for the Advancement of Science 2019-04-05 /pmc/articles/PMC6450695/ /pubmed/30972368 http://dx.doi.org/10.1126/sciadv.aav8575 Text en Copyright © 2019 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution License 4.0 (CC BY). http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Research Articles
Derunova, E.
Sun, Y.
Felser, C.
Parkin, S. S. P.
Yan, B.
Ali, M. N.
Giant intrinsic spin Hall effect in W(3)Ta and other A15 superconductors
title Giant intrinsic spin Hall effect in W(3)Ta and other A15 superconductors
title_full Giant intrinsic spin Hall effect in W(3)Ta and other A15 superconductors
title_fullStr Giant intrinsic spin Hall effect in W(3)Ta and other A15 superconductors
title_full_unstemmed Giant intrinsic spin Hall effect in W(3)Ta and other A15 superconductors
title_short Giant intrinsic spin Hall effect in W(3)Ta and other A15 superconductors
title_sort giant intrinsic spin hall effect in w(3)ta and other a15 superconductors
topic Research Articles
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6450695/
https://www.ncbi.nlm.nih.gov/pubmed/30972368
http://dx.doi.org/10.1126/sciadv.aav8575
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