Zyuzin, A. A. and Burkov, A. A. (2011) Thin topological insulator film in a perpendicular magnetic field. Physical Review B, 83 (19). Art. No. 195413. ISSN 1098-0121 http://resolver.caltech.edu/CaltechAUTHORS:20110525-085105535
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We report on a study of an ultrathin topological insulator film with hybridization between the top and bottom surfaces, placed in a quantizing perpendicular magnetic field. We calculate the full Landau-level spectrum of the film as a function of the applied magnetic field and the magnitude of the hybridization matrix element, taking into account both the orbital and the Zeeman spin splitting effects of the field. For an undoped film, we find a quantum phase transition between a state with a zero Hall conductivity and a state with a quantized Hall conductivity equal to e^2/h, as a function of the magnitude of the applied field. The transition is driven by the competition between the Zeeman and the hybridization energies.
|Additional Information:||© 2011 American Physical Society. Received 14 March 2011; revised manuscript received 31 March 2011; published 6 May 2011. We acknowledge useful discussions with J. Alicea, L. Balents, J. Eisenstein, and O. Motrunich. Financial support was provided by the NSERC of Canada and a University of Waterloo start-up grant. A.A.B. gratefully acknowledges hospitality of the Caltech Physics Department, where part of this work was performed.|
|Classification Code:||PACS: 73.50.-h, 73.43.Nq|
|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Tony Diaz|
|Deposited On:||14 Jun 2011 17:31|
|Last Modified:||26 Dec 2012 13:15|
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