Quasi-bound states in an NPN-type nanometer-scale graphene quantum dot under a magnetic field

Abstract We solve the quasi-bound state-energy spectra and wavefunctions of an NPN-type graphene quantum dot under a perpendicular magnetic field. The evolution of the quasi-bound state spectra under the magnetic field is investigated using a Wentzel–Kramers–Brillouin approximation. In numerical cal...

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Autores principales:	Yueting Pan, Haijiao Ji, Xin-Qi Li, Haiwen Liu
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2020
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/889b259b338043f7bff6cd6a08d6698b
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spelling	oai:doaj.org-article:889b259b338043f7bff6cd6a08d6698b2021-12-02T16:08:55ZQuasi-bound states in an NPN-type nanometer-scale graphene quantum dot under a magnetic field10.1038/s41598-020-77357-82045-2322https://doaj.org/article/889b259b338043f7bff6cd6a08d6698b2020-11-01T00:00:00Zhttps://doi.org/10.1038/s41598-020-77357-8https://doaj.org/toc/2045-2322Abstract We solve the quasi-bound state-energy spectra and wavefunctions of an NPN-type graphene quantum dot under a perpendicular magnetic field. The evolution of the quasi-bound state spectra under the magnetic field is investigated using a Wentzel–Kramers–Brillouin approximation. In numerical calculations, we also show that the twofold energy degeneracy of the opposite angular momenta breaks under a weak magnetic field. As the magnetic field strengthens, this phenomenon produces an observable splitting of the energy spectrum. Our results demonstrate the relation between the quasi-bound state-energy spectrum in graphene quantum dots and magnetic field strength, which is relevant to recent measurements in scanning tunneling microscopy.Yueting PanHaijiao JiXin-Qi LiHaiwen LiuNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 10, Iss 1, Pp 1-9 (2020)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Yueting Pan Haijiao Ji Xin-Qi Li Haiwen Liu Quasi-bound states in an NPN-type nanometer-scale graphene quantum dot under a magnetic field
description	Abstract We solve the quasi-bound state-energy spectra and wavefunctions of an NPN-type graphene quantum dot under a perpendicular magnetic field. The evolution of the quasi-bound state spectra under the magnetic field is investigated using a Wentzel–Kramers–Brillouin approximation. In numerical calculations, we also show that the twofold energy degeneracy of the opposite angular momenta breaks under a weak magnetic field. As the magnetic field strengthens, this phenomenon produces an observable splitting of the energy spectrum. Our results demonstrate the relation between the quasi-bound state-energy spectrum in graphene quantum dots and magnetic field strength, which is relevant to recent measurements in scanning tunneling microscopy.
format	article
author	Yueting Pan Haijiao Ji Xin-Qi Li Haiwen Liu
author_facet	Yueting Pan Haijiao Ji Xin-Qi Li Haiwen Liu
author_sort	Yueting Pan
title	Quasi-bound states in an NPN-type nanometer-scale graphene quantum dot under a magnetic field
title_short	Quasi-bound states in an NPN-type nanometer-scale graphene quantum dot under a magnetic field
title_full	Quasi-bound states in an NPN-type nanometer-scale graphene quantum dot under a magnetic field
title_fullStr	Quasi-bound states in an NPN-type nanometer-scale graphene quantum dot under a magnetic field
title_full_unstemmed	Quasi-bound states in an NPN-type nanometer-scale graphene quantum dot under a magnetic field
title_sort	quasi-bound states in an npn-type nanometer-scale graphene quantum dot under a magnetic field
publisher	Nature Portfolio
publishDate	2020
url	https://doaj.org/article/889b259b338043f7bff6cd6a08d6698b
work_keys_str_mv	AT yuetingpan quasiboundstatesinannpntypenanometerscalegraphenequantumdotunderamagneticfield AT haijiaoji quasiboundstatesinannpntypenanometerscalegraphenequantumdotunderamagneticfield AT xinqili quasiboundstatesinannpntypenanometerscalegraphenequantumdotunderamagneticfield AT haiwenliu quasiboundstatesinannpntypenanometerscalegraphenequantumdotunderamagneticfield
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Quasi-bound states in an NPN-type nanometer-scale graphene quantum dot under a magnetic field

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