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@ARTICLE{Ishida:201788,
      author       = {Ishida, H. and Liebsch, A.},
      title        = {{B}uried topological edge state associated with interface
                      between topological band insulator and {M}ott insulator},
      journal      = {Physical review / B},
      volume       = {90},
      number       = {20},
      issn         = {1098-0121},
      address      = {College Park, Md.},
      publisher    = {APS},
      reportid     = {FZJ-2015-04082},
      pages        = {205134},
      year         = {2014},
      abstract     = {The electronic structure at the interface between a
                      topological band insulator and a Mott insulator is studied
                      within layer dynamical mean field theory. To represent the
                      bulk phases of these systems, we use the generalized
                      Bernevig-Hughes-Zhang model that incorporates the
                      Hubbard-like on-site Coulomb energy U in addition to the
                      spin-orbit coupling term that causes band inversion. The
                      topological and Mott insulating phases are realized by
                      appropriately choosing smaller and larger values of U,
                      respectively. As expected, the interface is found to be
                      metallic because of the localized edge state. When the
                      Coulomb energy in the Mott insulator is close to the
                      critical value, however, this edge state exhibits its
                      largest amplitude deep within the Mott insulator rather than
                      at the interface. This finding corresponds to a new type of
                      proximity effect induced by the neighboring topological band
                      insulator and demonstrates that, as a result of spin-orbit
                      coupling within the Mott insulator, several layers near the
                      interface convert from the Mott insulating phase to a
                      topological insulating phase. Moreover, we argue that the
                      ordinary proximity effect, whereby a Kondo peak is induced
                      in a Mott insulator by neighboring metallic states, is
                      accompanied by an additional reverse proximity effect, by
                      which the Kondo peak gives rise to an enhancement of the
                      density of states in the neighboring metallic layer.},
      cin          = {IAS-1 / PGI-1},
      ddc          = {530},
      cid          = {I:(DE-Juel1)IAS-1-20090406 / I:(DE-Juel1)PGI-1-20110106},
      pnm          = {422 - Spin-based and quantum information (POF2-422)},
      pid          = {G:(DE-HGF)POF2-422},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000345538900006},
      doi          = {10.1103/PhysRevB.90.205134},
      url          = {https://juser.fz-juelich.de/record/201788},
}