Giant spin-orbit splitting in inverted InAs/GaSb double quantum wells

Fabrizio Nichele; Morten Kjærgaard; Henri Juhani Suominen; Rafal Skolasinski; Michael Wimmer; Binh-Minh Nguyen; Andrey A. Kiselev; Marko Sokolich; Michael J. Manfra; Fanming Qu; Arjan J.A. Beukman; Leo P. Kouwenhoven; Charles M. Marcus

doi:10.1103/PhysRevLett.118.016801

Giant spin-orbit splitting in inverted InAs/GaSb double quantum wells

Fabrizio Nichele, Morten Kjærgaard, Henri Juhani Suominen, Rafal Skolasinski, Michael Wimmer, Binh-Minh Nguyen, Andrey A. Kiselev, Marko Sokolich, Michael J. Manfra, Fanming Qu, Arjan J.A. Beukman, Leo P. Kouwenhoven, Charles M. Marcus

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24 Citationer (Scopus)

Abstract

Transport measurements in inverted InAs/GaSb quantum wells reveal a giant spin-orbit splitting of the energy bands close to the hybridization gap. The splitting results from the interplay of electron-hole mixing and spin-orbit coupling, and can exceed the hybridization gap. We experimentally investigate the band splitting as a function of top gate voltage for both electronlike and holelike states. Unlike conventional, noninverted two-dimensional electron gases, the Fermi energy in InAs/GaSb can cross a single spin-resolved band, resulting in full spin-orbit polarization. In the fully polarized regime we observe exotic transport phenomena such as quantum Hall plateaus evolving in e2/h steps and a nontrivial Berry phase.

Originalsprog	Engelsk
Artikelnummer	016801
Tidsskrift	Physical Review Letters
Vol/bind	118
ISSN	0031-9007
DOI	https://doi.org/10.1103/PhysRevLett.118.016801
Status	Udgivet - 5 jan. 2017

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10.1103/PhysRevLett.118.016801

PhysRevLett.118.016801Forlagets udgivne version, 649 KB

http://arxiv.org/pdf/1605.01241Licens: Andet

Citationsformater

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abstract = "Transport measurements in inverted InAs/GaSb quantum wells reveal a giant spin-orbit splitting of the energy bands close to the hybridization gap. The splitting results from the interplay of electron-hole mixing and spin-orbit coupling, and can exceed the hybridization gap. We experimentally investigate the band splitting as a function of top gate voltage for both electronlike and holelike states. Unlike conventional, noninverted two-dimensional electron gases, the Fermi energy in InAs/GaSb can cross a single spin-resolved band, resulting in full spin-orbit polarization. In the fully polarized regime we observe exotic transport phenomena such as quantum Hall plateaus evolving in e2/h steps and a nontrivial Berry phase.",

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T1 - Giant spin-orbit splitting in inverted InAs/GaSb double quantum wells

AU - Nichele, Fabrizio

AU - Kjærgaard, Morten

AU - Suominen, Henri Juhani

AU - Skolasinski, Rafal

AU - Wimmer, Michael

AU - Nguyen, Binh-Minh

AU - Kiselev, Andrey A.

AU - Sokolich, Marko

AU - Manfra, Michael J.

AU - Qu, Fanming

AU - Beukman, Arjan J.A.

AU - Kouwenhoven, Leo P.

AU - Marcus, Charles M.

N1 - [Qdev]

PY - 2017/1/5

Y1 - 2017/1/5

N2 - Transport measurements in inverted InAs/GaSb quantum wells reveal a giant spin-orbit splitting of the energy bands close to the hybridization gap. The splitting results from the interplay of electron-hole mixing and spin-orbit coupling, and can exceed the hybridization gap. We experimentally investigate the band splitting as a function of top gate voltage for both electronlike and holelike states. Unlike conventional, noninverted two-dimensional electron gases, the Fermi energy in InAs/GaSb can cross a single spin-resolved band, resulting in full spin-orbit polarization. In the fully polarized regime we observe exotic transport phenomena such as quantum Hall plateaus evolving in e2/h steps and a nontrivial Berry phase.

AB - Transport measurements in inverted InAs/GaSb quantum wells reveal a giant spin-orbit splitting of the energy bands close to the hybridization gap. The splitting results from the interplay of electron-hole mixing and spin-orbit coupling, and can exceed the hybridization gap. We experimentally investigate the band splitting as a function of top gate voltage for both electronlike and holelike states. Unlike conventional, noninverted two-dimensional electron gases, the Fermi energy in InAs/GaSb can cross a single spin-resolved band, resulting in full spin-orbit polarization. In the fully polarized regime we observe exotic transport phenomena such as quantum Hall plateaus evolving in e2/h steps and a nontrivial Berry phase.

U2 - 10.1103/PhysRevLett.118.016801

DO - 10.1103/PhysRevLett.118.016801

M3 - Journal article

C2 - 28106408

SN - 0031-9007

VL - 118

JO - Physical Review Letters

JF - Physical Review Letters

M1 - 016801

ER -

Giant spin-orbit splitting in inverted InAs/GaSb double quantum wells

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