2017/08/31 by R. S. Akzyanov, A. L. Rakhmanov · 2 citations
Materials Science · Mathematics · Physics and Astronomy · #Anisotropy #Condensed matter physics #Conductivity #Graphene research and applications #Image warping #Magnetic field #Magnetoresistance #Materials science #Mathematics #Physics #Quantum Hall effect #Quantum and electron transport phenomena #Quantum anomalous Hall effect #Quantum mechanics #Topological Materials and Phenomena #Topological insulator #Topology (electrical circuits) #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevb.97.075421
published as Phys. Rev. B 97, 075421 (2018) · 10 pages, 11 figures
openalex created_date 2017/08/17 · openalex publication_date 2018/02/16 · arxiv created 2018/06/21 · arxiv updated 2018/06/22 · openalex updated_date 2026/08/05
We investigate the influence of hexagonal warping on the transport properties of topological insulators. We study the charge conductivity within Kubo formalism in the first Born approximation using low-energy expansion of the Hamiltonian near the Dirac point. The effects of disorder, magnetic field, and chemical-potential value are analyzed in detail. We find that the presence of hexagonal warping significantly affects the conductivity of the topological insulator. In particular, it gives rise to the growth of the longitudinal conductivity with the increase of the disorder and anisotropic anomalous in-plane magnetoresistance. Hexagonal warping also affects the quantum anomalous Hall effect and anomalous out-of-plane magnetoresistance. The obtained results are consistent with the experimental data.