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https://hdl.handle.net/11147/12096
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DC Field | Value | Language |
---|---|---|
dc.contributor.author | Eren, İsmail | en_US |
dc.contributor.author | Güçlü, Alev Devrim | en_US |
dc.date.accessioned | 2022-06-24T05:56:21Z | - |
dc.date.available | 2022-06-24T05:56:21Z | - |
dc.date.issued | 2022-08-01 | - |
dc.identifier.issn | 381098 | - |
dc.identifier.uri | https://doi.org/10.1016/j.ssc.2022.114763 | - |
dc.identifier.uri | https://hdl.handle.net/11147/12096 | - |
dc.description.abstract | We investigate finite size and external magnetic field effects on the atomic collapse due to a Coulomb impurity placed at the center of a hexagonal graphene quantum dot within tight binding and mean-field Hubbard approaches. For large quantum dots, the atomic collapse effect persists when the magnetic field is present, characterized by a series of Landau level crossings and anticrossings, in agreement with previous bulk graphene results. However, we show that a new regime arises if the size of the quantum dot is comparable to or smaller than the magnetic length: While the lowest bound states cross the Fermi level at a lower value of coupling constant β<0.5, a size independent critical coupling constant βc∗>0.5 emerges in the local density of states spectrum, which increases with the applied magnetic field. These effects are found to be persistent in the presence of electron–electron interactions within mean-field Hubbard approximation. | en_US |
dc.language.iso | en | en_US |
dc.publisher | Elsevier | en_US |
dc.relation | Yapay Grafen Nanoyapılarda Çok Elektron Kuantum Etkileri | - |
dc.relation.ispartof | Solid State Communications | en_US |
dc.rights | info:eu-repo/semantics/embargoedAccess | en_US |
dc.subject | Atomic collapse | en_US |
dc.subject | Electronic structure | en_US |
dc.subject | Magnetic field | en_US |
dc.title | Atomic Collapse in Graphene Quantum Dots in a Magnetic Field | en_US |
dc.type | Article | en_US |
dc.authorid | 0000-0002-4351-7216 | en_US |
dc.authorid | WOS:000798237300010 | - |
dc.institutionauthor | Eren, İsmail | en_US |
dc.institutionauthor | Güçlü, Alev Devrim | en_US |
dc.department | İzmir Institute of Technology. Physics | en_US |
dc.identifier.wos | WOS:000798237300010 | en_US |
dc.identifier.scopus | 2-s2.0-85129023049 | en_US |
dc.relation.publicationcategory | Makale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı | en_US |
dc.identifier.doi | 10.1016/j.ssc.2022.114763 | - |
dc.contributor.affiliation | 01. Izmir Institute of Technology | en_US |
dc.contributor.affiliation | 01. Izmir Institute of Technology | en_US |
dc.relation.issn | 381098 | en_US |
dc.description.volume | 351 | en_US |
dc.relation.grantno | 119F119 | - |
item.fulltext | With Fulltext | - |
item.openairetype | Article | - |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.languageiso639-1 | en | - |
item.cerifentitytype | Publications | - |
item.grantfulltext | embargo_20250701 | - |
crisitem.author.dept | 04.05. Department of Pyhsics | - |
crisitem.author.dept | 04.05. Department of Pyhsics | - |
Appears in Collections: | Physics / Fizik Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection |
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File | Description | Size | Format | |
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1-s2.0-S0038109822001053-main.pdf Until 2025-07-01 | Article | 1.42 MB | Adobe PDF | View/Open Request a copy |
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