Theory of spin injection in two-dimensional metals with proximity-induced spin-orbit coupling

Yu Hsuan Lin; Chunli Huang; Manuel Offidani; Aires Ferreira; Miguel A. Cazalilla

doi:10.1103/PhysRevB.100.245424

Theory of spin injection in two-dimensional metals with proximity-induced spin-orbit coupling

Yu Hsuan Lin, Chunli Huang, Manuel Offidani, Aires Ferreira, Miguel A. Cazalilla

Research output: Contribution to journal › Article › peer-review

5 Scopus citations

Abstract

Spin injection is a powerful experimental probe into a wealth of nonequilibrium spin-dependent phenomena displayed by materials with sizable spin-orbit interactions. Here, we present a theory of coupled spin-charge diffusive transport in spin-valve devices built from two-dimensional materials. The formalism takes into account realistic spin-orbit effects with both spatially uniform and random components in van der Waals materials arising from the interfacial breaking of inversion symmetry. The various charge-to-spin conversion mechanisms known to be present in diffusive metals, including the spin Hall effect and several mechanisms contributing to current-induced spin polarization are accounted for. Our analysis shows that the dominant conversion mechanisms can be discerned by analyzing the nonlocal resistance of the spin valve for different polarizations of the injected spins and as a function of the applied in-plane magnetic field.

Original language	English
Article number	245424
Journal	Physical Review B
Volume	10
Issue number	24
DOIs	https://doi.org/10.1103/PhysRevB.100.245424
State	Published - Dec 19 2019

Bibliographical note

Publisher Copyright:
© 2019 American Physical Society.

Funding

M.A.C. and Y.H.L. have been supported by the Ministry of Science and Technology (Taiwan) under contract number NSC 102- 2112-M-007-024-MY5. M.A.C. also acknowledges the support of the National Center for Theoretical Sciences of Taiwan. A.F. gratefully acknowledges the financial support from the Royal Society, London through a Royal Society University Research Fellowship. M.O. and A.F. acknowledge funding from EPSRC (Grant Ref: EP/N004817/1). APPENDIX A:

Funders	Funder number
A.F.
M.A.C.
Royal Society University Research
Royal Society of London
National Center for Theoretical Sciences
Engineering and Physical Sciences Research Council	EP/N004817/1
Ministry of Science and Technology, Taiwan	NSC 102- 2112-M-007-024-MY5

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1103/PhysRevB.100.245424

Cite this

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abstract = "Spin injection is a powerful experimental probe into a wealth of nonequilibrium spin-dependent phenomena displayed by materials with sizable spin-orbit interactions. Here, we present a theory of coupled spin-charge diffusive transport in spin-valve devices built from two-dimensional materials. The formalism takes into account realistic spin-orbit effects with both spatially uniform and random components in van der Waals materials arising from the interfacial breaking of inversion symmetry. The various charge-to-spin conversion mechanisms known to be present in diffusive metals, including the spin Hall effect and several mechanisms contributing to current-induced spin polarization are accounted for. Our analysis shows that the dominant conversion mechanisms can be discerned by analyzing the nonlocal resistance of the spin valve for different polarizations of the injected spins and as a function of the applied in-plane magnetic field.",

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AU - Lin, Yu Hsuan

AU - Huang, Chunli

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AU - Ferreira, Aires

AU - Cazalilla, Miguel A.

PY - 2019/12/19

Y1 - 2019/12/19

N2 - Spin injection is a powerful experimental probe into a wealth of nonequilibrium spin-dependent phenomena displayed by materials with sizable spin-orbit interactions. Here, we present a theory of coupled spin-charge diffusive transport in spin-valve devices built from two-dimensional materials. The formalism takes into account realistic spin-orbit effects with both spatially uniform and random components in van der Waals materials arising from the interfacial breaking of inversion symmetry. The various charge-to-spin conversion mechanisms known to be present in diffusive metals, including the spin Hall effect and several mechanisms contributing to current-induced spin polarization are accounted for. Our analysis shows that the dominant conversion mechanisms can be discerned by analyzing the nonlocal resistance of the spin valve for different polarizations of the injected spins and as a function of the applied in-plane magnetic field.

AB - Spin injection is a powerful experimental probe into a wealth of nonequilibrium spin-dependent phenomena displayed by materials with sizable spin-orbit interactions. Here, we present a theory of coupled spin-charge diffusive transport in spin-valve devices built from two-dimensional materials. The formalism takes into account realistic spin-orbit effects with both spatially uniform and random components in van der Waals materials arising from the interfacial breaking of inversion symmetry. The various charge-to-spin conversion mechanisms known to be present in diffusive metals, including the spin Hall effect and several mechanisms contributing to current-induced spin polarization are accounted for. Our analysis shows that the dominant conversion mechanisms can be discerned by analyzing the nonlocal resistance of the spin valve for different polarizations of the injected spins and as a function of the applied in-plane magnetic field.

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Theory of spin injection in two-dimensional metals with proximity-induced spin-orbit coupling

Abstract

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