Unconventional quantum Hall effect in Floquet topological insulators

Handle URI:
http://hdl.handle.net/10754/622491
Title:
Unconventional quantum Hall effect in Floquet topological insulators
Authors:
Tahir, M.; Vasilopoulos, P.; Schwingenschlögl, Udo ( 0000-0003-4179-7231 )
Abstract:
We study an unconventional quantum Hall effect for the surface states of ultrathin Floquet topological insulators in a perpendicular magnetic field. The resulting band structure is modified by photon dressing and the topological property is governed by the low-energy dynamics of a single surface. An exchange of symmetric and antisymmetric surface states occurs by reversing the lights polarization. We find a novel quantum Hall state in which the zeroth Landau level undergoes a phase transition from a trivial insulator state, with Hall conductivity αyx = 0 at zero Fermi energy, to a Hall insulator state with αyx = e2/2h. These findings open new possibilities for experimentally realizing nontrivial quantum states and unusual quantum Hall plateaus at (±1/2,±3/2,±5/2, ...)e2/h. © 2016 IOP Publishing Ltd Printed in the UK.
KAUST Department:
Physical Sciences and Engineering (PSE) Division
Citation:
Tahir M, Vasilopoulos P, Schwingenschlögl U (2016) Unconventional quantum Hall effect in Floquet topological insulators. Journal of Physics: Condensed Matter 28: 385302. Available: http://dx.doi.org/10.1088/0953-8984/28/38/385302.
Publisher:
IOP Publishing
Journal:
Journal of Physics: Condensed Matter
Issue Date:
27-Jul-2016
DOI:
10.1088/0953-8984/28/38/385302
Type:
Article
ISSN:
0953-8984; 1361-648X
Sponsors:
This work was supported by the Canadian NSERC Grant No. OGP0121756 (MT, PV). The research reported in this publication was supported by funding from King Abdullah University of Science and Technology (KAUST) (US).
Additional Links:
http://iopscience.iop.org/article/10.1088/0953-8984/28/38/385302/meta
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorTahir, M.en
dc.contributor.authorVasilopoulos, P.en
dc.contributor.authorSchwingenschlögl, Udoen
dc.date.accessioned2017-01-02T09:28:34Z-
dc.date.available2017-01-02T09:28:34Z-
dc.date.issued2016-07-27en
dc.identifier.citationTahir M, Vasilopoulos P, Schwingenschlögl U (2016) Unconventional quantum Hall effect in Floquet topological insulators. Journal of Physics: Condensed Matter 28: 385302. Available: http://dx.doi.org/10.1088/0953-8984/28/38/385302.en
dc.identifier.issn0953-8984en
dc.identifier.issn1361-648Xen
dc.identifier.doi10.1088/0953-8984/28/38/385302en
dc.identifier.urihttp://hdl.handle.net/10754/622491-
dc.description.abstractWe study an unconventional quantum Hall effect for the surface states of ultrathin Floquet topological insulators in a perpendicular magnetic field. The resulting band structure is modified by photon dressing and the topological property is governed by the low-energy dynamics of a single surface. An exchange of symmetric and antisymmetric surface states occurs by reversing the lights polarization. We find a novel quantum Hall state in which the zeroth Landau level undergoes a phase transition from a trivial insulator state, with Hall conductivity αyx = 0 at zero Fermi energy, to a Hall insulator state with αyx = e2/2h. These findings open new possibilities for experimentally realizing nontrivial quantum states and unusual quantum Hall plateaus at (±1/2,±3/2,±5/2, ...)e2/h. © 2016 IOP Publishing Ltd Printed in the UK.en
dc.description.sponsorshipThis work was supported by the Canadian NSERC Grant No. OGP0121756 (MT, PV). The research reported in this publication was supported by funding from King Abdullah University of Science and Technology (KAUST) (US).en
dc.publisherIOP Publishingen
dc.relation.urlhttp://iopscience.iop.org/article/10.1088/0953-8984/28/38/385302/metaen
dc.subjectFloqueten
dc.subjectquantum Hall effecten
dc.subjecttopological insulatoren
dc.titleUnconventional quantum Hall effect in Floquet topological insulatorsen
dc.typeArticleen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.identifier.journalJournal of Physics: Condensed Matteren
dc.contributor.institutionDepartment of Physics, Concordia University, Montreal, QC, Canadaen
kaust.authorSchwingenschlögl, Udoen
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