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    Quantum magnetotransport properties of topological insulators under strain

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    Quantum magnetotransport properties of topological insulators under strain.pdf
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    Type
    Article
    Authors
    Tahir, Muhammad
    Schwingenschlögl, Udo cc
    KAUST Department
    Computational Physics and Materials Science (CPMS)
    Material Science and Engineering Program
    Physical Science and Engineering (PSE) Division
    Date
    2012-08-15
    Permanent link to this record
    http://hdl.handle.net/10754/315787
    
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    Abstract
    We present a detailed theoretical investigation of the quantum magnetotransport properties of topological insulators under strain. We consider an external magnetic field perpendicular to the surface of the topological insulator in the presence of strain induced by the substrate. The strain effects mix the lower and upper surface states of neighboring Landau levels into two unequally spaced energy branches. Analytical expressions are derived for the collisional conductivity for elastic impurity scattering in the first Born approximation. We also calculate the Hall conductivity using the Kubo formalism. Evidence for the beating of Shubnikov–de Haas oscillations is found from the temperature and magnetic field dependence of the collisional and Hall conductivities. In the regime of a strong magnetic field, the beating pattern is replaced by a splitting of the magnetoresistance peaks due to finite strain energy. These results are in excellent agreement with recent HgTe transport experiments.
    Citation
    Tahir M, Schwingenschlögl U (2012) Quantum magnetotransport properties of topological insulators under strain. Phys Rev B 86. doi:10.1103/PhysRevB.86.075310.
    Publisher
    American Physical Society (APS)
    Journal
    Physical Review B
    DOI
    10.1103/PhysRevB.86.075310
    arXiv
    1603.03584
    Additional Links
    http://link.aps.org/doi/10.1103/PhysRevB.86.075310
    ae974a485f413a2113503eed53cd6c53
    10.1103/PhysRevB.86.075310
    Scopus Count
    Collections
    Articles; Physical Science and Engineering (PSE) Division; Material Science and Engineering Program; Computational Physics and Materials Science (CPMS)

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