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@ARTICLE{Heidtfeld:901912,
      author       = {Heidtfeld, Sarah and Adam, Roman and Kubota, Takahide and
                      Takanashi, Koki and Cao, Derang and Schmitz-Antoniak,
                      Carolin and Bürgler, Daniel E. and Wang, Fangzhou and Greb,
                      Christian and Chen, Genyu and Komissarov, Ivan and
                      Hardtdegen, Hilde and Mikulics, Martin and Sobolewski, Roman
                      and Suga, Shigemasa and Schneider, Claus M.},
      title        = {{G}eneration of terahertz transients from {C}o 2 {F}e 0.4
                      {M}n 0.6 {S}i -{H}eusler-alloy/normal-metal nanobilayers
                      excited by femtosecond optical pulses},
      journal      = {Physical review research},
      volume       = {3},
      number       = {4},
      issn         = {2643-1564},
      address      = {College Park, MD},
      publisher    = {APS},
      reportid     = {FZJ-2021-03899},
      pages        = {043025},
      year         = {2021},
      abstract     = {We generated pulses of electromagnetic radiation in the
                      terahertz (THz) frequency range by optical excitation of
                      Co2Fe0.4Mn0.6Si (CFMS)/normal-metal (NM) bilayer structures.
                      The CFMS is a Heusler alloy showing a band gap in one spin
                      channel and is therefore a half metal. We compared the THz
                      emission efficiency in a systematic manner for four
                      different CFMS/NM bilayers, where NM was either Pt, Ta, Cr,
                      or Al. Our measurements show that the THz intensity is
                      highest for a Pt capping. We also demonstrate the tunability
                      of the THz amplitude by varying the magnetic field for all
                      four bilayers. We attribute the THz generation to the
                      inverse spin Hall effect. In order to investigate the role
                      of the interface in THz generation, we measured the spin
                      mixing conductance for each CFMS/NM bilayer using a
                      ferromagnetic resonance method. We found that the spin-orbit
                      coupling cannot completely describe the THz generation in
                      the bilayers and that the spin transmission efficiency of
                      the CFMS/NM interface and the spin diffusion length, as well
                      as the oxidation of the NM layer, play crucial roles in the
                      THz emission process.},
      cin          = {PGI-6 / ER-C-2},
      ddc          = {530},
      cid          = {I:(DE-Juel1)PGI-6-20110106 / I:(DE-Juel1)ER-C-2-20170209},
      pnm          = {5214 - Quantum State Preparation and Control (POF4-521)},
      pid          = {G:(DE-HGF)POF4-5214},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000707506500002},
      doi          = {10.1103/PhysRevResearch.3.043025},
      url          = {https://juser.fz-juelich.de/record/901912},
}