Please use this identifier to cite or link to this item: https://hdl.handle.net/11147/12096
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dc.contributor.authorEren, İsmailen_US
dc.contributor.authorGüçlü, Alev Devrimen_US
dc.date.accessioned2022-06-24T05:56:21Z-
dc.date.available2022-06-24T05:56:21Z-
dc.date.issued2022-08-01-
dc.identifier.issn381098-
dc.identifier.urihttps://doi.org/10.1016/j.ssc.2022.114763-
dc.identifier.urihttps://hdl.handle.net/11147/12096-
dc.description.abstractWe 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.isoenen_US
dc.publisherElsevieren_US
dc.relationYapay Grafen Nanoyapılarda Çok Elektron Kuantum Etkileri-
dc.relation.ispartofSolid State Communicationsen_US
dc.rightsinfo:eu-repo/semantics/embargoedAccessen_US
dc.subjectAtomic collapseen_US
dc.subjectElectronic structureen_US
dc.subjectMagnetic fielden_US
dc.titleAtomic Collapse in Graphene Quantum Dots in a Magnetic Fielden_US
dc.typeArticleen_US
dc.authorid0000-0002-4351-7216en_US
dc.authoridWOS:000798237300010-
dc.institutionauthorEren, İsmailen_US
dc.institutionauthorGüçlü, Alev Devrimen_US
dc.departmentİzmir Institute of Technology. Physicsen_US
dc.identifier.wosWOS:000798237300010en_US
dc.identifier.scopus2-s2.0-85129023049en_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.identifier.doi10.1016/j.ssc.2022.114763-
dc.contributor.affiliation01. Izmir Institute of Technologyen_US
dc.contributor.affiliation01. Izmir Institute of Technologyen_US
dc.relation.issn381098en_US
dc.description.volume351en_US
dc.relation.grantno119F119-
item.fulltextWith Fulltext-
item.openairetypeArticle-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.languageiso639-1en-
item.cerifentitytypePublications-
item.grantfulltextembargo_20250701-
crisitem.author.dept04.05. Department of Pyhsics-
crisitem.author.dept04.05. 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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