Silicene dynamic optical response in the presence of external electric and exchange fields

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buir.contributor.authorTanatar, Bilal
buir.contributor.orcidTanatar, Bilal|0000-0002-5246-0119
dc.citation.epage11en_US
dc.citation.issueNumber11en_US
dc.citation.spage1en_US
dc.citation.volumeNumber34en_US
dc.contributor.authorMirzaei, M.
dc.contributor.authorVazifehshenas, T.
dc.contributor.authorSalavati-fard, T.
dc.contributor.authorTanatar, Bilal
dc.date.accessioned2023-02-28T13:46:47Z
dc.date.available2023-02-28T13:46:47Z
dc.date.issued2022-01-04
dc.departmentDepartment of Physicsen_US
dc.description.abstractWe investigate the dynamic optical transition of monolayer silicene in the presence of external electric and exchange fields within the low-energy tight-binding model. Applying external electric and exchange fields breaks the silicene band structure spin and valley degeneracies. Three phases of silicene corresponding to different strengths of perpendicular electric field with respect to the spin–orbit coupling (Δz < Δso, Δz = Δso and Δz > Δso) are considered. We obtain the spin-valley-dependent optical responses to the incoming circularly polarized light using the Kubo formula. We show and discuss how the magnitude and direction of the transverse and longitudinal optical responses of such a system change with the electric and exchange fields. Our calculations suggest that the intraband part of the longitudinal optical response as well as the initial point of the interband part have strong dependencies on the exchange field. Furthermore, we show that one of the spin subbands plays a dominant role in the response to polarized light. Depending on the type of incident light polarization, the dominant subband may change. Our results shed light on the relation between silicene dynamic optical responses and externally applied fields.en_US
dc.description.provenanceSubmitted by Ayça Nur Sezen (ayca.sezen@bilkent.edu.tr) on 2023-02-28T13:46:47Z No. of bitstreams: 1 Silicene_dynamic_optical_response_in_the_presence_of_external_electric_and_exchange_fields.pdf: 2804946 bytes, checksum: 2837885709c16bb1e2f42a6459a0e228 (MD5)en
dc.description.provenanceMade available in DSpace on 2023-02-28T13:46:47Z (GMT). No. of bitstreams: 1 Silicene_dynamic_optical_response_in_the_presence_of_external_electric_and_exchange_fields.pdf: 2804946 bytes, checksum: 2837885709c16bb1e2f42a6459a0e228 (MD5) Previous issue date: 2022-01-04en
dc.identifier.doi10.1088/1361-648X/ac44d4en_US
dc.identifier.eissn1361-648X
dc.identifier.issn0953-8984
dc.identifier.urihttp://hdl.handle.net/11693/111953
dc.language.isoEnglishen_US
dc.publisherInstitute of Physics Publishing Ltd.en_US
dc.relation.isversionofhttps://doi.org/10.1088/1361-648X/ac44d4en_US
dc.source.titleJournal of Physics: Condensed Matteren_US
dc.subjectSiliceneen_US
dc.subjectOptical responseen_US
dc.subjectElectric and exchange fieldsen_US
dc.subjectKubo formulaen_US
dc.subjectCircular polarizationen_US
dc.titleSilicene dynamic optical response in the presence of external electric and exchange fieldsen_US
dc.typeArticleen_US

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