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Quantum Adiabatic Pumping in Rashba- Dresselhaus-Aharonov-Bohm Interferometer

We investigate the quantum adiabatic pumping effect in an interferometer attached to two one-dimensional leads. The interferometer is subjected to an Aharonov-Bohm flux and Rashba-Dresselhaus spin-orbit interaction. Using Brouwer’s formula and rigorous scattering eigenstates, we obtained the general...

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Autor principal: Tokura, Yasuhiro
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7515357/
http://dx.doi.org/10.3390/e21090828
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author Tokura, Yasuhiro
author_facet Tokura, Yasuhiro
author_sort Tokura, Yasuhiro
collection PubMed
description We investigate the quantum adiabatic pumping effect in an interferometer attached to two one-dimensional leads. The interferometer is subjected to an Aharonov-Bohm flux and Rashba-Dresselhaus spin-orbit interaction. Using Brouwer’s formula and rigorous scattering eigenstates, we obtained the general closed formula for the pumping Berry curvatures depending on spin for general interferometers when the external control parameters only modulate the scattering eigenstates and corresponding eigenvalues. In this situation, pumping effect is absent in the combination of the control parameters of Aharonov-Bohm flux and spin-orbit interaction strength. We have shown that finite pumping is possible by modulating both Rashba and Dresselhaus interaction strengths and explicitly demonstrated the spin-pumping effect in a diamond-shaped interferometer made of four sites.
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spelling pubmed-75153572020-11-09 Quantum Adiabatic Pumping in Rashba- Dresselhaus-Aharonov-Bohm Interferometer Tokura, Yasuhiro Entropy (Basel) Article We investigate the quantum adiabatic pumping effect in an interferometer attached to two one-dimensional leads. The interferometer is subjected to an Aharonov-Bohm flux and Rashba-Dresselhaus spin-orbit interaction. Using Brouwer’s formula and rigorous scattering eigenstates, we obtained the general closed formula for the pumping Berry curvatures depending on spin for general interferometers when the external control parameters only modulate the scattering eigenstates and corresponding eigenvalues. In this situation, pumping effect is absent in the combination of the control parameters of Aharonov-Bohm flux and spin-orbit interaction strength. We have shown that finite pumping is possible by modulating both Rashba and Dresselhaus interaction strengths and explicitly demonstrated the spin-pumping effect in a diamond-shaped interferometer made of four sites. MDPI 2019-08-24 /pmc/articles/PMC7515357/ http://dx.doi.org/10.3390/e21090828 Text en © 2019 by the author. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Tokura, Yasuhiro
Quantum Adiabatic Pumping in Rashba- Dresselhaus-Aharonov-Bohm Interferometer
title Quantum Adiabatic Pumping in Rashba- Dresselhaus-Aharonov-Bohm Interferometer
title_full Quantum Adiabatic Pumping in Rashba- Dresselhaus-Aharonov-Bohm Interferometer
title_fullStr Quantum Adiabatic Pumping in Rashba- Dresselhaus-Aharonov-Bohm Interferometer
title_full_unstemmed Quantum Adiabatic Pumping in Rashba- Dresselhaus-Aharonov-Bohm Interferometer
title_short Quantum Adiabatic Pumping in Rashba- Dresselhaus-Aharonov-Bohm Interferometer
title_sort quantum adiabatic pumping in rashba- dresselhaus-aharonov-bohm interferometer
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7515357/
http://dx.doi.org/10.3390/e21090828
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