Conductance fluctuations in disordered 2D topological insulator wires: From quantum spin-Hall to ordinary quantum phases

  title={Conductance fluctuations in disordered 2D topological insulator wires: From quantum spin-Hall to ordinary quantum phases},
  author={Hsiu-Chuan Hsu and Ioannis Kleftogiannis and G. Y. Guo and V{\'i}ctor A. Gopar},
  journal={arXiv: Mesoscale and Nanoscale Physics},
Impurities and defects are ubiquitous in topological insulators (TIs) and thus understanding the effects of disorder on electronic transport is important. We calculate the distribution of the random conductance fluctuations $P(G)$ of disordered 2D TI wires modeled by the Bernevig-Hughes-Zhang (BHZ) Hamiltonian with realistic parameters. As we show, the disorder drives the TIs into different regimes: metal (M), quantum spin-Hall insulator (QSHI), and ordinary insulator (OI). By varying the… 
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