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@ARTICLE{Nechaev:202081,
      author       = {Nechaev, I. A. and Aguilera, I. and De Renzi, V. and di
                      Bona, A. and Lodi Rizzini, A. and Mio, A. M. and Nicotra, G.
                      and Politano, A. and Scalese, S. and Aliev, Z. S. and
                      Babanly, M. B. and Friedrich, Christoph and Blügel, S. and
                      Chulkov, E. V.},
      title        = {{Q}uasiparticle spectrum and plasmonic excitations in the
                      topological insulator {S}b $_{2}$ {T}e $_{3}$},
      journal      = {Physical review / B},
      volume       = {91},
      number       = {24},
      issn         = {1098-0121},
      address      = {College Park, Md.},
      publisher    = {APS},
      reportid     = {FZJ-2015-04370},
      pages        = {245123},
      year         = {2015},
      abstract     = {We report first-principles GW results on the dispersion of
                      the bulk band-gap edges in the three-dimensional topological
                      insulator Sb2Te3. We find that, independently of the
                      reference density-functional-theory band structure and the
                      crystal-lattice parameters used, the one-shot GW corrections
                      enlarge the fundamental band gap, bringing its value in
                      close agreement with experiment. We conclude that the GW
                      corrections cause the displacement of the valence-band
                      maximum (VBM) to the Γ point, ensuring that the
                      surface-state Dirac point lies above the VBM. We extend our
                      study to the analysis of the electron-energy-loss spectrum
                      (EELS) of bulk Sb2Te3. In particular, we perform
                      energy-filtered transmission electron microscopy and
                      reflection EELS measurements. We show that the random-phase
                      approximation with the GW quasiparticle energies and taking
                      into account virtual excitations from the semicore states
                      leads to good agreement with our experimental data.},
      cin          = {IAS-1 / PGI-1 / JARA-FIT},
      ddc          = {530},
      cid          = {I:(DE-Juel1)IAS-1-20090406 / I:(DE-Juel1)PGI-1-20110106 /
                      $I:(DE-82)080009_20140620$},
      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:000355969300003},
      doi          = {10.1103/PhysRevB.91.245123},
      url          = {https://juser.fz-juelich.de/record/202081},
}