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@ARTICLE{Adamantopoulos:909946,
      author       = {Adamantopoulos, T. and Merte, Maximilian and Go, D. and
                      Freimuth, F. and Blügel, S. and Mokrousov, Y.},
      title        = {{L}aser-induced charge and spin photocurrents at the
                      {B}i{A}g 2 surface: {A} first-principles benchmark},
      journal      = {Physical review research},
      volume       = {4},
      number       = {4},
      issn         = {2643-1564},
      address      = {College Park, MD},
      publisher    = {APS},
      reportid     = {FZJ-2022-03540},
      pages        = {043046},
      year         = {2022},
      abstract     = {Here, we report first-principles calculations of
                      laser-induced photocurrents at the surface of a prototype
                      Rashba system. By referring to Keldysh nonequilibrium
                      formalism combined with the Wannier interpolation scheme, we
                      perform first-principles electronic structure calculations
                      of a prototype BiAg2 surface alloy, which is a well-known
                      material realization of the Rashba model. In addition to the
                      nonmagnetic ground state situation, we also study the case
                      of in-plane magnetized BiAg2. We calculate the laser-induced
                      charge photocurrents for the ferromagnetic case and the
                      laser-induced spin photocurrents for both the nonmagnetic
                      and the ferromagnetic cases. Our results confirm the
                      emergence of very large in-plane photocurrents as predicted
                      by the Rashba model and are in agreement with previous
                      experimental measurements of THz emission generated at Bi/Ag
                      interfaces. The resulting photocurrents satisfy all the
                      symmetry restrictions with respect to the light helicity and
                      the magnetization direction. We provide microscopic insights
                      into the symmetry and magnitude of the computed currents
                      based on the ab initio multiband electronic structure of the
                      system, and scrutinize the importance of resonant two-band
                      and three-band transitions for driven currents, thereby
                      establishing a benchmark picture of photocurrents at
                      Rashba-like surfaces and interfaces. Our work contributes to
                      establishing the interfacial Rashba spin-orbit interaction
                      as a major mechanism for the generation of in-plane
                      photocurrents, which are of great interest in the field of
                      ultrafast and terahertz spintronics.},
      cin          = {PGI-1 / IAS-1},
      ddc          = {530},
      cid          = {I:(DE-Juel1)PGI-1-20110106 / I:(DE-Juel1)IAS-1-20090406},
      pnm          = {5211 - Topological Matter (POF4-521)},
      pid          = {G:(DE-HGF)POF4-5211},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000888565400002},
      doi          = {10.1103/PhysRevResearch.4.043046},
      url          = {https://juser.fz-juelich.de/record/909946},
}