Spin hall effect in symmetric wells with two subbands

M. O. Hachiya; M. Lee; E. Bernardes; J. C. Egues; D. Loss

doi:10.1007/s10948-009-0545-y

Spin hall effect in symmetric wells with two subbands

M. O. Hachiya
, M. Lee
, E. Bernardes
, J. C. Egues
, D. Loss

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

1 Scopus citations

Abstract

We investigate the spin Hall conductivity σ _xy ^z of a clean 2D electron gas formed in a two-subband well. We determine σ _xy ^z as arising from the inter-subband induced spin-orbit (SO) coupling η (Calsaverini et al., Phys. Rev. B 78:155313, 2008) via a linear-response approach due to Rashba. By self-consistently calculating η for realistic wells, we find that σ _xy ^z presents a non-monotonic (and non-universal) behavior and a sign change as the Fermi energy varies between the subband edges. Although our σ _xy ^z is very small (i.e., <"e/4π "), it is non-zero as opposed to linear-in-k SO models.

Original language	English
Pages (from-to)	65-68
Number of pages	4
Journal	Journal of Superconductivity and Novel Magnetism
Volume	23
Issue number	1
DOIs	https://doi.org/10.1007/s10948-009-0545-y
State	Published - Jan 2010
Externally published	Yes

Keywords

Inter-subband spin-orbit interaction
Spin Hall conductivity
Two-subband quantum wells

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1007/s10948-009-0545-y

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title = "Spin hall effect in symmetric wells with two subbands",

abstract = "We investigate the spin Hall conductivity σ xy z of a clean 2D electron gas formed in a two-subband well. We determine σ xy z as arising from the inter-subband induced spin-orbit (SO) coupling η (Calsaverini et al., Phys. Rev. B 78:155313, 2008) via a linear-response approach due to Rashba. By self-consistently calculating η for realistic wells, we find that σ xy z presents a non-monotonic (and non-universal) behavior and a sign change as the Fermi energy varies between the subband edges. Although our σ xy z is very small (i.e., <{"}e/4π {"}), it is non-zero as opposed to linear-in-k SO models.",

keywords = "Inter-subband spin-orbit interaction, Spin Hall conductivity, Two-subband quantum wells",

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TY - JOUR

T1 - Spin hall effect in symmetric wells with two subbands

AU - Hachiya, M. O.

AU - Lee, M.

AU - Bernardes, E.

AU - Egues, J. C.

AU - Loss, D.

PY - 2010/1

Y1 - 2010/1

N2 - We investigate the spin Hall conductivity σ xy z of a clean 2D electron gas formed in a two-subband well. We determine σ xy z as arising from the inter-subband induced spin-orbit (SO) coupling η (Calsaverini et al., Phys. Rev. B 78:155313, 2008) via a linear-response approach due to Rashba. By self-consistently calculating η for realistic wells, we find that σ xy z presents a non-monotonic (and non-universal) behavior and a sign change as the Fermi energy varies between the subband edges. Although our σ xy z is very small (i.e., <"e/4π "), it is non-zero as opposed to linear-in-k SO models.

AB - We investigate the spin Hall conductivity σ xy z of a clean 2D electron gas formed in a two-subband well. We determine σ xy z as arising from the inter-subband induced spin-orbit (SO) coupling η (Calsaverini et al., Phys. Rev. B 78:155313, 2008) via a linear-response approach due to Rashba. By self-consistently calculating η for realistic wells, we find that σ xy z presents a non-monotonic (and non-universal) behavior and a sign change as the Fermi energy varies between the subband edges. Although our σ xy z is very small (i.e., <"e/4π "), it is non-zero as opposed to linear-in-k SO models.

KW - Inter-subband spin-orbit interaction

KW - Spin Hall conductivity

KW - Two-subband quantum wells

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DO - 10.1007/s10948-009-0545-y

M3 - Article

AN - SCOPUS:73349099674

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VL - 23

SP - 65

EP - 68

JO - Journal of Superconductivity and Novel Magnetism

JF - Journal of Superconductivity and Novel Magnetism

IS - 1

ER -

Spin hall effect in symmetric wells with two subbands

Abstract

Keywords

ASJC Scopus subject areas

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