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dc.contributor.author
Shibata, Kenji
dc.contributor.author
Karalic, Matija
dc.contributor.author
Mittag, Christopher
dc.contributor.author
Tschirky, Thomas
dc.contributor.author
Reichl, Christian
dc.contributor.author
Ito, Hiromu
dc.contributor.author
Hashimoto, Katsushi
dc.contributor.author
Tomimatsu, Toru
dc.contributor.author
Hirayama, Yoshiro
dc.contributor.author
Wegscheider, Werner
dc.contributor.author
Ihn, Thomas Markus
dc.contributor.author
Ensslin, Klaus
dc.date.accessioned
2021-01-22T11:19:30Z
dc.date.available
2021-01-22T10:07:07Z
dc.date.available
2021-01-22T11:19:30Z
dc.date.issued
2020
dc.identifier.issn
2643-1564
dc.identifier.other
10.1103/PhysRevResearch.2.033383
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/464693
dc.identifier.doi
10.3929/ethz-b-000464693
dc.description.abstract
We have performed magnetotransport measurements on electrically induced two-dimensional hole gases in undoped GaSb/AlSb quantum wells. The mobilities of the holes are sufficient to observe Shubnikov–de Haas oscillations for a few teslas of perpendicular magnetic field. We extracted the effective masses of holes in the valence bands from temperature-dependent Shubnikov–de Haas oscillations. The effective masses, in the unit of the free-electron mass, strongly depend on the width of the quantum wells and are 0.14–0.16 for the spin-degenerated subbands in an 8-nm-thick quantum well and 0.44–0.52 for one of the spin-split subbands in a 25-nm-thick quantum well. Furthermore, by fitting the weak antilocalization correction to the classical magnetoresistance at low magnetic fields, we obtained the phase coherence length of the system. The phase coherence length increases with hole density, reaching maxima of around 1100 and 600 nm for the 8- and 25-nm-thick quantum wells, respectively. These achievements build upon our previous results on GaSb quantum wells and further our understanding of their properties. They therefore lay the groundwork for realizing spin-based electronics based on the strong spin-orbit interaction in this promising system.
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
American Physical Society
en_US
dc.rights.uri
http://creativecommons.org/licenses/by/4.0/
dc.title
Magnetotransport of electrically induced two-dimensional hole gases in undoped GaSb quantum wells
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution 4.0 International
dc.date.published
2020-09-09
ethz.journal.title
Physical Review Research
ethz.journal.volume
2
en_US
ethz.journal.issue
3
en_US
ethz.journal.abbreviated
Phys. Rev. Res.
ethz.pages.start
033383
en_US
ethz.size
6 p.
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.identifier.wos
ethz.identifier.scopus
ethz.publication.place
College Park, MD
en_US
ethz.publication.status
published
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02010 - Dep. Physik / Dep. of Physics::02505 - Laboratorium für Festkörperphysik / Laboratory for Solid State Physics::03439 - Ensslin, Klaus / Ensslin, Klaus
en_US
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02010 - Dep. Physik / Dep. of Physics::02505 - Laboratorium für Festkörperphysik / Laboratory for Solid State Physics::03439 - Ensslin, Klaus / Ensslin, Klaus
ethz.date.deposited
2021-01-22T10:07:14Z
ethz.source
BATCH
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2021-01-22T11:19:40Z
ethz.rosetta.lastUpdated
2021-02-15T23:29:48Z
ethz.rosetta.exportRequired
true
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true
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