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...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2020-11-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-020-77357-8 |
| _version_ | 1818682760372420608 |
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| 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 |
| collection | DOAJ |
| 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. |
| first_indexed | 2024-12-17T10:23:58Z |
| format | Article |
| id | doaj.art-889b259b338043f7bff6cd6a08d6698b |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-12-17T10:23:58Z |
| publishDate | 2020-11-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-889b259b338043f7bff6cd6a08d6698b2022-12-21T21:52:42ZengNature PortfolioScientific Reports2045-23222020-11-011011910.1038/s41598-020-77357-8Quasi-bound states in an NPN-type nanometer-scale graphene quantum dot under a magnetic fieldYueting Pan0Haijiao Ji1Xin-Qi Li2Haiwen Liu3Center for Advanced Quantum Studies, Department of Physics, Beijing Normal UniversityCenter for Advanced Quantum Studies, Department of Physics, Beijing Normal UniversityCenter for Joint Quantum Studies, School of Science, Tianjin UniversityCenter for Advanced Quantum Studies, Department of Physics, Beijing Normal UniversityAbstract 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.https://doi.org/10.1038/s41598-020-77357-8 |
| spellingShingle | 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 Scientific Reports |
| title | 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_short | 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 |
| url | https://doi.org/10.1038/s41598-020-77357-8 |
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