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@ARTICLE{SnchezBarriga:858220,
      author       = {Sánchez-Barriga, J. and Aguilera, I. and Yashina, L. V.
                      and Tsukanova, D. Y. and Freyse, F. and Chaika, A. N. and
                      Callaert, C. and Abakumov, A. M. and Hadermann, J. and
                      Varykhalov, A. and Rienks, E. D. L. and Bihlmayer, G. and
                      Blügel, S. and Rader, O.},
      title        = {{A}nomalous behavior of the electronic structure of ( {B}i
                      1 − x {I}n x ) 2 {S}e 3 across the quantum phase
                      transition from topological to trivial insulator},
      journal      = {Physical review / B},
      volume       = {98},
      number       = {23},
      issn         = {2469-9950},
      address      = {Woodbury, NY},
      publisher    = {Inst.},
      reportid     = {FZJ-2018-07120},
      pages        = {235110},
      year         = {2018},
      abstract     = {Using spin- and angle-resolved photoemission spectroscopy
                      and relativistic many-body calculations, we investigate the
                      evolution of the electronic structure of (Bi1−xInx)2Se3
                      bulk single crystals around the critical point of the
                      trivial to topological insulator quantum-phase transition.
                      By increasing x, we observe how a surface gap opens at the
                      Dirac point of the initially gapless topological surface
                      state of Bi2Se3, leading to the existence of massive
                      fermions. The surface gap monotonically increases for a wide
                      range of x values across the topological and trivial sides
                      of the quantum-phase transition. By means of
                      photon-energy-dependent measurements, we demonstrate that
                      the gapped surface state survives the inversion of the bulk
                      bands which occurs at a critical point near x=0.055. The
                      surface state exhibits a nonzero in-plane spin polarization
                      which decays exponentially with increasing x, and which
                      persists in both the topological and trivial insulator
                      phases. Our calculations reveal qualitative agreement with
                      the experimental results all across the quantum-phase
                      transition upon the systematic variation of the spin-orbit
                      coupling strength. A non-time-reversal symmetry-breaking
                      mechanism of bulk-mediated scattering processes that
                      increase with decreasing spin-orbit coupling strength is
                      proposed as explanation.},
      cin          = {IAS-1 / PGI-1 / JARA-FIT / JARA-HPC},
      ddc          = {530},
      cid          = {I:(DE-Juel1)IAS-1-20090406 / I:(DE-Juel1)PGI-1-20110106 /
                      $I:(DE-82)080009_20140620$ / $I:(DE-82)080012_20140620$},
      pnm          = {142 - Controlling Spin-Based Phenomena (POF3-142) / 143 -
                      Controlling Configuration-Based Phenomena (POF3-143) /
                      Magnetic Anisotropy of Metallic Layered Systems and
                      Nanostructures $(jiff13_20131101)$},
      pid          = {G:(DE-HGF)POF3-142 / G:(DE-HGF)POF3-143 /
                      $G:(DE-Juel1)jiff13_20131101$},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000452322800003},
      doi          = {10.1103/PhysRevB.98.235110},
      url          = {https://juser.fz-juelich.de/record/858220},
}