Spin-charge conversion in disordered two-dimensional electron gases lacking inversion symmetry

Chunli Huang; Mirco Milletarì; Miguel A. Cazalilla

doi:10.1103/PhysRevB.96.205305

Spin-charge conversion in disordered two-dimensional electron gases lacking inversion symmetry

Chunli Huang, Mirco Milletarì, Miguel A. Cazalilla

Physics And Astronomy

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Abstract

We study the spin-charge conversion mechanisms in a two-dimensional gas of electrons moving in a smooth disorder potential by accounting for both Rashba-type and Mott's skew scattering contributions. We find that the quantum interference effects between spin-flip and skew scattering give rise to anisotropic spin precession scattering (ASP), a direct spin-charge conversion mechanism that was discovered in an earlier study of graphene decorated with adatoms [Huang, Phys. Rev. B 94, 085414 (2016)2469-995010.1103/PhysRevB.94.085414]. Our findings suggest that, together with other spin-charge conversion mechanisms such as the inverse galvanic effect, ASP is a fairly universal phenomenon that should be present in disordered two-dimensional systems lacking inversion symmetry.

Original language	English
Article number	205305
Journal	Physical Review B
Volume	96
Issue number	20
DOIs	https://doi.org/10.1103/PhysRevB.96.205305
State	Published - Nov 20 2017

Bibliographical note

Funding Information:
We gratefully acknowledge R. Raimondi for kindly delivering a series of lectures on the -covariant Schwinger-Keldysh formalism after the workshop “Recent Progress in Spintronics of 2D Materials” held at the National Center for Theoretical Sciences in Taiwan. C.H. and M.A.C. acknowledge support from the Ministry of Science and Technology (Taiwan) under Contract No. NSC 102-2112-M-007-024-MY5 and Taiwan's National Center of Theoretical Sciences (NCTS). C.H. also acknowledges support from Singapore National Research Foundation Grant No. NRFF2012-02, and from Singapore Ministry of Education Academic Research Fund Tier 2 Grant No. MOE2015-T2-2-008. M.M. thanks C. Verma for his hospitality at the Bioinfomatics Institute in Singapore where this work was initiated. C. H. gratefully acknowledges the hospitality of the Donostia International Physics Center.

Funding Information:
covariant Schwinger-Keldysh formalism after the workshop â€œRecent Progress in Spintronics of 2D Materialsâ€ held at the National Center for Theoretical Sciences in Taiwan. C.H. and M.A.C. acknowledge support from the Ministry of Science and Technology (Taiwan) under Contract No. NSC 102-2112-M-007-024-MY5 and Taiwan's National Center of Theoretical Sciences (NCTS). C.H. also acknowledges support from Singapore National Research Foundation Grant No. NRFF2012-02, and from Singapore Ministry of Education Academic Research Fund Tier 2 Grant No. MOE2015-T2-2-008. M.M. thanks C. Verma for his hospitality at the Bioinfomatics Institute in Singapore where this work was initiated. C. H. gratefully acknowledges the hospitality of the Donostia International Physics Center.

Publisher Copyright:
© 2017 American Physical Society.

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1103/PhysRevB.96.205305

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title = "Spin-charge conversion in disordered two-dimensional electron gases lacking inversion symmetry",

abstract = "We study the spin-charge conversion mechanisms in a two-dimensional gas of electrons moving in a smooth disorder potential by accounting for both Rashba-type and Mott's skew scattering contributions. We find that the quantum interference effects between spin-flip and skew scattering give rise to anisotropic spin precession scattering (ASP), a direct spin-charge conversion mechanism that was discovered in an earlier study of graphene decorated with adatoms [Huang, Phys. Rev. B 94, 085414 (2016)2469-995010.1103/PhysRevB.94.085414]. Our findings suggest that, together with other spin-charge conversion mechanisms such as the inverse galvanic effect, ASP is a fairly universal phenomenon that should be present in disordered two-dimensional systems lacking inversion symmetry.",

author = "Chunli Huang and Mirco Milletar{\`i} and Cazalilla, {Miguel A.}",

note = "Funding Information: We gratefully acknowledge R. Raimondi for kindly delivering a series of lectures on the -covariant Schwinger-Keldysh formalism after the workshop “Recent Progress in Spintronics of 2D Materials” held at the National Center for Theoretical Sciences in Taiwan. C.H. and M.A.C. acknowledge support from the Ministry of Science and Technology (Taiwan) under Contract No. NSC 102-2112-M-007-024-MY5 and Taiwan's National Center of Theoretical Sciences (NCTS). C.H. also acknowledges support from Singapore National Research Foundation Grant No. NRFF2012-02, and from Singapore Ministry of Education Academic Research Fund Tier 2 Grant No. MOE2015-T2-2-008. M.M. thanks C. Verma for his hospitality at the Bioinfomatics Institute in Singapore where this work was initiated. C. H. gratefully acknowledges the hospitality of the Donostia International Physics Center. Funding Information: covariant Schwinger-Keldysh formalism after the workshop {\^a}€{\oe}Recent Progress in Spintronics of 2D Materials{\^a}€ held at the National Center for Theoretical Sciences in Taiwan. C.H. and M.A.C. acknowledge support from the Ministry of Science and Technology (Taiwan) under Contract No. NSC 102-2112-M-007-024-MY5 and Taiwan's National Center of Theoretical Sciences (NCTS). C.H. also acknowledges support from Singapore National Research Foundation Grant No. NRFF2012-02, and from Singapore Ministry of Education Academic Research Fund Tier 2 Grant No. MOE2015-T2-2-008. M.M. thanks C. Verma for his hospitality at the Bioinfomatics Institute in Singapore where this work was initiated. C. H. gratefully acknowledges the hospitality of the Donostia International Physics Center. Publisher Copyright: {\textcopyright} 2017 American Physical Society.",

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PY - 2017/11/20

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N2 - We study the spin-charge conversion mechanisms in a two-dimensional gas of electrons moving in a smooth disorder potential by accounting for both Rashba-type and Mott's skew scattering contributions. We find that the quantum interference effects between spin-flip and skew scattering give rise to anisotropic spin precession scattering (ASP), a direct spin-charge conversion mechanism that was discovered in an earlier study of graphene decorated with adatoms [Huang, Phys. Rev. B 94, 085414 (2016)2469-995010.1103/PhysRevB.94.085414]. Our findings suggest that, together with other spin-charge conversion mechanisms such as the inverse galvanic effect, ASP is a fairly universal phenomenon that should be present in disordered two-dimensional systems lacking inversion symmetry.

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Spin-charge conversion in disordered two-dimensional electron gases lacking inversion symmetry

Abstract

Bibliographical note

ASJC Scopus subject areas

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