Conductance fluctuations in InAs quantum wells possibly driven by Zitterbewegung

Abstract The highly successful Dirac equation predicts peculiar phenomena such as Klein tunnelling and Zitterbewegung (ZB) of electrons. From its conception by Erwin Schrödinger, ZB has been considered key in understanding relativistic quantum mechanics. However, observing the ZB of electrons has pr...

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Autores principales:	Yu Iwasaki, Yoshiaki Hashimoto, Taketomo Nakamura, Shingo Katsumoto
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/b6112a96a0dc446ebc363f6330b680ed
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spelling	oai:doaj.org-article:b6112a96a0dc446ebc363f6330b680ed2021-12-02T15:06:22ZConductance fluctuations in InAs quantum wells possibly driven by Zitterbewegung10.1038/s41598-017-06818-42045-2322https://doaj.org/article/b6112a96a0dc446ebc363f6330b680ed2017-08-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-06818-4https://doaj.org/toc/2045-2322Abstract The highly successful Dirac equation predicts peculiar phenomena such as Klein tunnelling and Zitterbewegung (ZB) of electrons. From its conception by Erwin Schrödinger, ZB has been considered key in understanding relativistic quantum mechanics. However, observing the ZB of electrons has proved difficult, and instead various emulations of the phenomenon have been proposed producing several successes. Concerning charge transport in semiconductors and graphene, expectations were high but little has been reported. Here, we report a surprisingly large ZB effect on charge transport in a semiconductor nanostructure playing “flat pinball”. The setup is a narrow strip of InAs two-dimensional electron gas with strong Rashba spin–orbit coupling. Six quantum point contacts act as pinball pockets. In transiting between two contacts, ZB appears as a large reproducible conductance fluctuation that depends on the in-plane magnetic field. Numerical simulations successfully reproduced our experimental observations confirming that ZB causes this conductance fluctuation.Yu IwasakiYoshiaki HashimotoTaketomo NakamuraShingo KatsumotoNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-9 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Yu Iwasaki Yoshiaki Hashimoto Taketomo Nakamura Shingo Katsumoto Conductance fluctuations in InAs quantum wells possibly driven by Zitterbewegung
description	Abstract The highly successful Dirac equation predicts peculiar phenomena such as Klein tunnelling and Zitterbewegung (ZB) of electrons. From its conception by Erwin Schrödinger, ZB has been considered key in understanding relativistic quantum mechanics. However, observing the ZB of electrons has proved difficult, and instead various emulations of the phenomenon have been proposed producing several successes. Concerning charge transport in semiconductors and graphene, expectations were high but little has been reported. Here, we report a surprisingly large ZB effect on charge transport in a semiconductor nanostructure playing “flat pinball”. The setup is a narrow strip of InAs two-dimensional electron gas with strong Rashba spin–orbit coupling. Six quantum point contacts act as pinball pockets. In transiting between two contacts, ZB appears as a large reproducible conductance fluctuation that depends on the in-plane magnetic field. Numerical simulations successfully reproduced our experimental observations confirming that ZB causes this conductance fluctuation.
format	article
author	Yu Iwasaki Yoshiaki Hashimoto Taketomo Nakamura Shingo Katsumoto
author_facet	Yu Iwasaki Yoshiaki Hashimoto Taketomo Nakamura Shingo Katsumoto
author_sort	Yu Iwasaki
title	Conductance fluctuations in InAs quantum wells possibly driven by Zitterbewegung
title_short	Conductance fluctuations in InAs quantum wells possibly driven by Zitterbewegung
title_full	Conductance fluctuations in InAs quantum wells possibly driven by Zitterbewegung
title_fullStr	Conductance fluctuations in InAs quantum wells possibly driven by Zitterbewegung
title_full_unstemmed	Conductance fluctuations in InAs quantum wells possibly driven by Zitterbewegung
title_sort	conductance fluctuations in inas quantum wells possibly driven by zitterbewegung
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/b6112a96a0dc446ebc363f6330b680ed
work_keys_str_mv	AT yuiwasaki conductancefluctuationsininasquantumwellspossiblydrivenbyzitterbewegung AT yoshiakihashimoto conductancefluctuationsininasquantumwellspossiblydrivenbyzitterbewegung AT taketomonakamura conductancefluctuationsininasquantumwellspossiblydrivenbyzitterbewegung AT shingokatsumoto conductancefluctuationsininasquantumwellspossiblydrivenbyzitterbewegung
_version_	1718388474573225984

Conductance fluctuations in InAs quantum wells possibly driven by Zitterbewegung

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