Electrostatic quantum dots in silicene
Abstract We study electrostatic quantum dot confinement for charge carriers in silicene. The confinement is formed by vertical electric field surrounding the quantum dot area. The resulting energy gap in the outside of the quantum dot traps the carriers within, and the difference of electrostatic po...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2018-05-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-018-25534-1 |
| _version_ | 1818858006091137024 |
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| author | B. Szafran D. Żebrowski Alina Mreńca-Kolasińska |
| author_facet | B. Szafran D. Żebrowski Alina Mreńca-Kolasińska |
| author_sort | B. Szafran |
| collection | DOAJ |
| description | Abstract We study electrostatic quantum dot confinement for charge carriers in silicene. The confinement is formed by vertical electric field surrounding the quantum dot area. The resulting energy gap in the outside of the quantum dot traps the carriers within, and the difference of electrostatic potentials on the buckled silicene sublattices produces nonzero carrier masses outside the quantum dot. We study the electrostatic confinement defined inside a silicene flake with both the atomistic tight-binding approach as well as with the continuum approximation for a circularly symmetric electrostatic potential. We find localization of the states within the quantum dot and their decoupling from the edge that makes the spectrum of the localized states independent of the crystal termination. For an armchair edge of the flake removal of the intervalley scattering by the electrostatic confinement is found. |
| first_indexed | 2024-12-19T08:49:25Z |
| format | Article |
| id | doaj.art-59799bc9d1934eb494ea5c0e4b5cf987 |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-12-19T08:49:25Z |
| publishDate | 2018-05-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-59799bc9d1934eb494ea5c0e4b5cf9872022-12-21T20:28:46ZengNature PortfolioScientific Reports2045-23222018-05-01811910.1038/s41598-018-25534-1Electrostatic quantum dots in siliceneB. Szafran0D. Żebrowski1Alina Mreńca-Kolasińska2AGH University of Science and Technology, Faculty of Physics and Applied Computer ScienceAGH University of Science and Technology, Faculty of Physics and Applied Computer ScienceAGH University of Science and Technology, Faculty of Physics and Applied Computer ScienceAbstract We study electrostatic quantum dot confinement for charge carriers in silicene. The confinement is formed by vertical electric field surrounding the quantum dot area. The resulting energy gap in the outside of the quantum dot traps the carriers within, and the difference of electrostatic potentials on the buckled silicene sublattices produces nonzero carrier masses outside the quantum dot. We study the electrostatic confinement defined inside a silicene flake with both the atomistic tight-binding approach as well as with the continuum approximation for a circularly symmetric electrostatic potential. We find localization of the states within the quantum dot and their decoupling from the edge that makes the spectrum of the localized states independent of the crystal termination. For an armchair edge of the flake removal of the intervalley scattering by the electrostatic confinement is found.https://doi.org/10.1038/s41598-018-25534-1 |
| spellingShingle | B. Szafran D. Żebrowski Alina Mreńca-Kolasińska Electrostatic quantum dots in silicene Scientific Reports |
| title | Electrostatic quantum dots in silicene |
| title_full | Electrostatic quantum dots in silicene |
| title_fullStr | Electrostatic quantum dots in silicene |
| title_full_unstemmed | Electrostatic quantum dots in silicene |
| title_short | Electrostatic quantum dots in silicene |
| title_sort | electrostatic quantum dots in silicene |
| url | https://doi.org/10.1038/s41598-018-25534-1 |
| work_keys_str_mv | AT bszafran electrostaticquantumdotsinsilicene AT dzebrowski electrostaticquantumdotsinsilicene AT alinamrencakolasinska electrostaticquantumdotsinsilicene |