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Longitudinal wave function control in single quantum dots with an applied magnetic field
Controlling single-particle wave functions in single semiconductor quantum dots is in demand to implement solid-state quantum information processing and spintronics. Normally, particle wave functions can be tuned transversely by an perpendicular magnetic field. We report a longitudinal wave function...
Autores principales: | , , , , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group
2015
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4306960/ https://www.ncbi.nlm.nih.gov/pubmed/25624018 http://dx.doi.org/10.1038/srep08041 |
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author | Cao, Shuo Tang, Jing Gao, Yunan Sun, Yue Qiu, Kangsheng Zhao, Yanhui He, Min Shi, Jin-An Gu, Lin Williams, David A. Sheng, Weidong Jin, Kuijuan Xu, Xiulai |
author_facet | Cao, Shuo Tang, Jing Gao, Yunan Sun, Yue Qiu, Kangsheng Zhao, Yanhui He, Min Shi, Jin-An Gu, Lin Williams, David A. Sheng, Weidong Jin, Kuijuan Xu, Xiulai |
author_sort | Cao, Shuo |
collection | PubMed |
description | Controlling single-particle wave functions in single semiconductor quantum dots is in demand to implement solid-state quantum information processing and spintronics. Normally, particle wave functions can be tuned transversely by an perpendicular magnetic field. We report a longitudinal wave function control in single quantum dots with a magnetic field. For a pure InAs quantum dot with a shape of pyramid or truncated pyramid, the hole wave function always occupies the base because of the less confinement at base, which induces a permanent dipole oriented from base to apex. With applying magnetic field along the base-apex direction, the hole wave function shrinks in the base plane. Because of the linear changing of the confinement for hole wave function from base to apex, the center of effective mass moves up during shrinking process. Due to the uniform confine potential for electrons, the center of effective mass of electrons does not move much, which results in a permanent dipole moment change and an inverted electron-hole alignment along the magnetic field direction. Manipulating the wave function longitudinally not only provides an alternative way to control the charge distribution with magnetic field but also a new method to tune electron-hole interaction in single quantum dots. |
format | Online Article Text |
id | pubmed-4306960 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2015 |
publisher | Nature Publishing Group |
record_format | MEDLINE/PubMed |
spelling | pubmed-43069602015-02-06 Longitudinal wave function control in single quantum dots with an applied magnetic field Cao, Shuo Tang, Jing Gao, Yunan Sun, Yue Qiu, Kangsheng Zhao, Yanhui He, Min Shi, Jin-An Gu, Lin Williams, David A. Sheng, Weidong Jin, Kuijuan Xu, Xiulai Sci Rep Article Controlling single-particle wave functions in single semiconductor quantum dots is in demand to implement solid-state quantum information processing and spintronics. Normally, particle wave functions can be tuned transversely by an perpendicular magnetic field. We report a longitudinal wave function control in single quantum dots with a magnetic field. For a pure InAs quantum dot with a shape of pyramid or truncated pyramid, the hole wave function always occupies the base because of the less confinement at base, which induces a permanent dipole oriented from base to apex. With applying magnetic field along the base-apex direction, the hole wave function shrinks in the base plane. Because of the linear changing of the confinement for hole wave function from base to apex, the center of effective mass moves up during shrinking process. Due to the uniform confine potential for electrons, the center of effective mass of electrons does not move much, which results in a permanent dipole moment change and an inverted electron-hole alignment along the magnetic field direction. Manipulating the wave function longitudinally not only provides an alternative way to control the charge distribution with magnetic field but also a new method to tune electron-hole interaction in single quantum dots. Nature Publishing Group 2015-01-27 /pmc/articles/PMC4306960/ /pubmed/25624018 http://dx.doi.org/10.1038/srep08041 Text en Copyright © 2015, Macmillan Publishers Limited. All rights reserved http://creativecommons.org/licenses/by-nc-sa/4.0/ This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder in order to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-sa/4.0/ |
spellingShingle | Article Cao, Shuo Tang, Jing Gao, Yunan Sun, Yue Qiu, Kangsheng Zhao, Yanhui He, Min Shi, Jin-An Gu, Lin Williams, David A. Sheng, Weidong Jin, Kuijuan Xu, Xiulai Longitudinal wave function control in single quantum dots with an applied magnetic field |
title | Longitudinal wave function control in single quantum dots with an applied magnetic field |
title_full | Longitudinal wave function control in single quantum dots with an applied magnetic field |
title_fullStr | Longitudinal wave function control in single quantum dots with an applied magnetic field |
title_full_unstemmed | Longitudinal wave function control in single quantum dots with an applied magnetic field |
title_short | Longitudinal wave function control in single quantum dots with an applied magnetic field |
title_sort | longitudinal wave function control in single quantum dots with an applied magnetic field |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4306960/ https://www.ncbi.nlm.nih.gov/pubmed/25624018 http://dx.doi.org/10.1038/srep08041 |
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