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@ARTICLE{Krasovskii:825003,
      author       = {Krasovskii, E. E. and Friedrich, Christoph and Schattke, W.
                      and Echenique, P. M.},
      title        = {{R}apid propagation of a {B}loch wave packet excited by a
                      femtosecond ultraviolet pulse},
      journal      = {Physical review / B},
      volume       = {94},
      number       = {19},
      issn         = {2469-9950},
      address      = {Woodbury, NY},
      publisher    = {Inst.},
      reportid     = {FZJ-2016-07499},
      pages        = {195434},
      year         = {2016},
      abstract     = {Attosecond streaking spectroscopy of solids provides direct
                      observation of the dynamics of electron excitation and
                      transport through the surface. We demonstrate the crucial
                      role of the exciting field in electron propagation and
                      establish that the lattice scattering of the outgoing
                      electron during the optical pumping leads to the wave packet
                      moving faster than with the group velocity and faster than
                      the free electron. We solve the time-dependent Schrödinger
                      equation for a model of laser-assisted photoemission, with
                      inelastic scattering treated as electron absorption and
                      alternatively by means of random collisions. For a weak
                      lattice scattering, the phenomenological result that the
                      photoelectron moves with the group velocity dE/dℏk and
                      traverses on average the distance equal to the mean-free
                      path is proved to hold even at very short traveling times.
                      This offers a novel interpretation of the delay time in
                      streaking experiment and sheds new light on tunneling in
                      optoelectronic devices.},
      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)},
      pid          = {G:(DE-HGF)POF3-142 / G:(DE-HGF)POF3-143},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000388465800004},
      doi          = {10.1103/PhysRevB.94.195434},
      url          = {https://juser.fz-juelich.de/record/825003},
}