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Impact of high-frequency pumping on anomalous finite-size effects in three-dimensional topological insulators

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dc.contributor Háskóli Íslands
dc.contributor University of Iceland
dc.contributor.author Pervishko, Anastasiia A.
dc.contributor.author Yudin, Dmitry
dc.contributor.author Shelykh, Ivan
dc.date.accessioned 2019-03-15T10:55:38Z
dc.date.available 2019-03-15T10:55:38Z
dc.date.issued 2018-02-16
dc.identifier.citation Pervishko, A. A., Yudin, D., & Shelykh, I. A. (2018). Impact of high-frequency pumping on anomalous finite-size effects in three-dimensional topological insulators. Physical Review B, 97(7), 075420. doi:10.1103/PhysRevB.97.075420
dc.identifier.issn 2469-9950
dc.identifier.issn 2469-9969 (eISSN)
dc.identifier.uri https://hdl.handle.net/20.500.11815/1054
dc.description Publisher's version (útgefin grein)
dc.description.abstract Lowering of the thickness of a thin-film three-dimensional topological insulator down to a few nanometers results in the gap opening in the spectrum of topologically protected two-dimensional surface states. This phenomenon, which is referred to as the anomalous finite-size effect, originates from hybridization between the states propagating along the opposite boundaries. In this work, we consider a bismuth-based topological insulator and show how the coupling to an intense high-frequency linearly polarized pumping can further be used to manipulate the value of a gap. We address this effect within recently proposed Brillouin-Wigner perturbation theory that allows us to map a time-dependent problem into a stationary one. Our analysis reveals that both the gap and the components of the group velocity of the surface states can be tuned in a controllable fashion by adjusting the intensity of the driving field within an experimentally accessible range and demonstrate the effect of light-induced band inversion in the spectrum of the surface states for high enough values of the pump.
dc.description.sponsorship The support from Megagrant No. 14.Y26.31.0015 and Project No. 3.8884.2017/8.9 of the Ministry of Education and Science of the Russian Federation is gratefully acknowledged. D.Y. acknowledges the support from RFBR Project No. 16- 32-60040. I.A.S. acknowledges support from Project No. 3.2614.2017/4.6 of the Ministry of Education and Science of Russian Federation, Rannis Project No. 163082-051, and Horizon2020 RISE project CoExAN.
dc.format.extent 075420
dc.language.iso en
dc.publisher American Physical Society (APS)
dc.relation info:eu-repo/grantAgreement/EC/H2020/CoExAN
dc.relation.ispartofseries Physical Review B;97(7)
dc.rights info:eu-repo/semantics/openAccess
dc.subject Band gap
dc.subject Light-matter interaction
dc.subject Spin-orbit coupling
dc.subject Topological insulators
dc.subject Condensed Matter & Materials Physics
dc.subject Grannfræði
dc.subject Þéttefnisfræði
dc.title Impact of high-frequency pumping on anomalous finite-size effects in three-dimensional topological insulators
dc.type info:eu-repo/semantics/article
dc.description.version Peer Reviewed
dc.identifier.journal Physical Review B
dc.identifier.doi 10.1103/PhysRevB.97.075420
dc.contributor.department Raunvísindastofnun (HÍ)
dc.contributor.department Science Institute (UI)
dc.contributor.school Verkfræði- og náttúruvísindasvið (HÍ)
dc.contributor.school School of Engineering and Natural Sciences (UI)

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