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@ARTICLE{Zhang:22138,
      author       = {Zhang, H. and Freimuth, F. and Bihlmayer, G. and Blügel,
                      S. and Mokrousov, Y.},
      title        = {{T}opological phases of {B}i(111) bilayer in an external
                      exchange field},
      journal      = {Physical review / B},
      volume       = {86},
      number       = {3},
      issn         = {1098-0121},
      address      = {College Park, Md.},
      publisher    = {APS},
      reportid     = {PreJuSER-22138},
      pages        = {035104},
      year         = {2012},
      note         = {We acknowledge very helpful discussions with Emil Prodan,
                      Sheng Li, Klaus Koepernik, and Marjana Lezaic. This work was
                      supported by the HGF-YIG Programme VH-NG-513 and by the DFG
                      through Research Unit 912 and Grant No. HE3292/7-1.
                      Computational resources were provided by the Julich
                      Supercomputing Centre.},
      abstract     = {Using first-principles methods, we investigate topological
                      phase transitions as a function of exchange field in a
                      Bi(111) bilayer. Evaluation of the spin Chern number for
                      different magnitudes of the exchange field reveals that when
                      the time-reversal symmetry is broken by a small exchange
                      field, the system enters the time-reversal broken
                      topological insulator phase, introduced by Yang et al.
                      [Phys. Rev. Lett. 107, 066602 (2011)]. After a metallic
                      phase in the intermediate region, the quantum anomalous Hall
                      phase with a nonzero Chern number emerges at a sufficiently
                      large exchange field. We analyze the phase diagram from the
                      viewpoint of the evolution of the electronic structure, edge
                      states, and transport properties and demonstrate that
                      different topological phases can be distinguished by the
                      spin polarization of the edge states as well as spin or
                      charge transverse conductivity.},
      keywords     = {J (WoSType)},
      cin          = {IAS-1 / PGI-1},
      ddc          = {530},
      cid          = {I:(DE-Juel1)IAS-1-20090406 / I:(DE-Juel1)PGI-1-20110106},
      pnm          = {Grundlagen für zukünftige Informationstechnologien},
      pid          = {G:(DE-Juel1)FUEK412},
      shelfmark    = {Physics, Condensed Matter},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000306089200004},
      doi          = {10.1103/PhysRevB.86.035104},
      url          = {https://juser.fz-juelich.de/record/22138},
}