Nature Communications (Feb 2016)

Nonmagnetic band gap at the Dirac point of the magnetic topological insulator (Bi1−xMnx)2Se3

  • J. Sánchez-Barriga,
  • A. Varykhalov,
  • G. Springholz,
  • H. Steiner,
  • R. Kirchschlager,
  • G. Bauer,
  • O. Caha,
  • E. Schierle,
  • E. Weschke,
  • A. A. Ünal,
  • S. Valencia,
  • M. Dunst,
  • J. Braun,
  • H. Ebert,
  • J. Minár,
  • E. Golias,
  • L. V. Yashina,
  • A. Ney,
  • V. Holý,
  • O. Rader

DOI
https://doi.org/10.1038/ncomms10559
Journal volume & issue
Vol. 7, no. 1
pp. 1 – 10

Abstract

Read online

Doping a topological insulator with magnetic impurities is expected to induce ferromagnetism and open a band gap in its surface states. Here, the authors study Mn-doped Bi2Se3, finding a mechanism for band gap opening in topologically-protected surface states which is not of magnetic origin.