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@ARTICLE{Battiato:836641,
      author       = {Battiato, Marco and Aguilera, Irene and Sánchez-Barriga,
                      Jaime},
      title        = {{G}eneralized {GW}+{B}oltzmann {A}pproach for the
                      {D}escription of {U}ltrafast {E}lectron {D}ynamics in
                      {T}opological {I}nsulators},
      journal      = {Materials},
      volume       = {10},
      number       = {7},
      issn         = {1996-1944},
      address      = {Basel},
      publisher    = {MDPI},
      reportid     = {FZJ-2017-05712},
      pages        = {810},
      year         = {2017},
      abstract     = {Quantum-phase transitions between trivial insulators and
                      topological insulators differ from ordinary metal-insulator
                      transitions in that they arise from the inversion of the
                      bulk band structure due to strong spin–orbit coupling.
                      Such topological phase transitions are unique in nature as
                      they lead to the emergence of topological surface states
                      which are characterized by a peculiar spin texture that is
                      believed to play a central role in the generation and
                      manipulation of dissipationless surface spin currents on
                      ultrafast timescales. Here, we provide a generalized GW
                      +Boltzmann approach for the description of ultrafast
                      dynamics in topological insulators driven by
                      electron–electron and electron–phonon scatterings.
                      Taking the prototypical insulator Bi 2 Te 3 as an example,
                      we test the robustness of our approach by comparing the
                      theoretical prediction to results of time- and
                      angle-resolved photoemission experiments. From this
                      comparison, we are able to demonstrate the crucial role of
                      the excited spin texture in the subpicosecond relaxation of
                      transient electrons, as well as to accurately obtain the
                      magnitude and strength of electron–electron and
                      electron–phonon couplings. Our approach could be used as a
                      generalized theory for three-dimensional topological
                      insulators in the bulk-conducting transport regime, paving
                      the way for the realization of a unified theory of ultrafast
                      dynamics in topological materials},
      cin          = {IAS-1 / PGI-1 / JARA-FIT / JARA-HPC},
      ddc          = {600},
      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)},
      pid          = {G:(DE-HGF)POF3-142 / G:(DE-HGF)POF3-143},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000406683000127},
      pubmed       = {pmid:28773171},
      doi          = {10.3390/ma10070810},
      url          = {https://juser.fz-juelich.de/record/836641},
}