Magnetization fluctuations on the surface of a magnetically-doped topological insulator

ORAL

Abstract

Ordering of magnetic impurities on the surface of a topological insulator gaps out the surface states and gives rise to anomalous quantum Hall effect, as demonstrated in recent experiments [1, 2]. Here we study theoretically fluctuation phenomena that occur in the vicinity of the ferromagnetic transition in such magnetically-doped topological insulators. We calculate the density of states of the electronic excitations and study transport properties in the fluctuation region. \\[4pt] [1] S.Y. Xu et al., Nature Phys. 8, 616 (2012). \\[0pt] [2] Y. L. Chen et al., Science 329, 659 (2010).

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Authors

  • Dmitry Efimkin

    • Condensed Matter Theory Center, University of Maryland, College Park, MD
    • CMTC, Dept. of Physics, University of Maryland at College Park

  • Victor Galitski

    • Condensed Matter Theory Center, University of Maryland, College Park, MD and Joint Quantum Institute, University of Maryland, College Park, MD
    • CMTC, Dept. of Physics, University of Maryland at College Park
    • University of Maryland, College Park
    • University of Maryland at College Park
    • University of Maryland
    • Univ of Maryland-College Park