Two-dimensional Dirac fermions in a topological insulator: transport in the quantum limit

J. G. Analytis; R. D. McDonald; S. C. Riggs; J. -H. Chu; G. S. Boebinger; I. R. Fisher

doi:10.1038/NPHYS1861

Two-dimensional Dirac fermions in a topological insulator: transport in the quantum limit

Mesoscale and Nanoscale Physics 2010-12-03 v1 Strongly Correlated Electrons

Authors: J. G. Analytis , R. D. McDonald , S. C. Riggs , J. -H. Chu , G. S. Boebinger , I. R. Fisher

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Abstract

Pulsed magnetic fields of up to 55T are used to investigate the transport properties of the topological insulator Bi_2Se_3 in the extreme quantum limit. For samples with a bulk carrier density of n = 2.9\times10^16cm^-3, the lowest Landau level of the bulk 3D Fermi surface is reached by a field of 4T. For fields well beyond this limit, Shubnikov-de Haas oscillations arising from quantization of the 2D surface state are observed, with the \nu =1 Landau level attained by a field of 35T. These measurements reveal the presence of additional oscillations which occur at fields corresponding to simple rational fractions of the integer Landau indices.

Keywords

topological insulator Dirac fermion quantum limit Shubnikov-de Haas oscillation Landau level transport Bi2Se3

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@article{arxiv.1003.1713,
  title  = {Two-dimensional Dirac fermions in a topological insulator: transport in the quantum limit},
  author = {J. G. Analytis and R. D. McDonald and S. C. Riggs and J. -H. Chu and G. S. Boebinger and I. R. Fisher},
  journal= {arXiv preprint arXiv:1003.1713},
  year   = {2010}
}

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5 pages, 4 figures

Two-dimensional Dirac fermions in a topological insulator: transport in the quantum limit

Abstract

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