Shubnikov–de Haas oscillations as a probe for topological insulators
POSTER
Abstract
In this work we study the bulk Shubnikov–de Haas oscillations (SdH) of 2D topological insulators. Our approach uses the complete 4x4 BHZ model [1] and a phenomenological trace formula [2] for the density of states accounting for Landau-level quantization. Within the topological regime, our results show unusual beatings of the SdH oscillations for a wide range of parameters. These unusual beatings are related to the coexistence of both electron- and hole-like carriers, present in the “Mexican hat” regime. This suggests ordinary SdH oscillations as a probe for bulk 2D systems with non-trivial band topology.
[1] B. Andrei Bernevig, Taylor L. Hughes, Shou-Cheng Zhang, Science 314, 1757 (2006).
[2] Brack, M., and R. K. Bhaduri, 1997, Semiclassical Physics (Addison-Wesley, Reading, MA)
[1] B. Andrei Bernevig, Taylor L. Hughes, Shou-Cheng Zhang, Science 314, 1757 (2006).
[2] Brack, M., and R. K. Bhaduri, 1997, Semiclassical Physics (Addison-Wesley, Reading, MA)
Presenters
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Denis R Candido
Department of Physics and Astronomy, University of Iowa, University of Iowa, Univ of Iowa
Authors
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Joo Vitor Ignácio Costa
Instituto de Física de São Carlos, Universidade de São Paulo
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Denis R Candido
Department of Physics and Astronomy, University of Iowa, University of Iowa, Univ of Iowa
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Sigurdur I. Erlingsson
School of Science and Engineering, Reykjavik University
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Carlos Egues
Instituto de Física de São Carlos, Universidade de São Paulo, University of Sao Paulo, Sao Carlos, Instituto de Física de São Carlos, Institute of Physics of São Carlos, University of São Paulo