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@ARTICLE{Chen:888463,
      author       = {Chen, Guan-Yu and Huang, Angus and Lin, Yen-Hui and Chen,
                      Chia-Ju and Lin, Deng-Sung and Chang, Po-Yao and Jeng,
                      Horng-Tay and Bihlmayer, Gustav and Hsu, Pin-Jui},
      title        = {{O}rbital-enhanced warping effect in px,py-derived {R}ashba
                      spin splitting of monatomic bismuth surface alloy},
      journal      = {npj quantum materials},
      volume       = {5},
      number       = {1},
      issn         = {2397-4648},
      address      = {[London]},
      publisher    = {Nature Publishing Group},
      reportid     = {FZJ-2020-04931},
      pages        = {89},
      year         = {2020},
      abstract     = {Spin-split Rashba bands have been exploited to efficiently
                      control the spin degree of freedom of moving electrons,
                      which possesses a great potential in frontier applications
                      of designing spintronic devices and processing spin-based
                      information. Given an intrinsic breaking of inversion
                      symmetry and sizeable spin–orbit interaction,
                      two-dimensional (2D) surface alloys formed by heavy metal
                      elements exhibit a pronounced Rashba-type spin splitting of
                      the surface states. Here, we have revealed the essential
                      role of atomic orbital symmetry in the hexagonally warped
                      Rashba spin-split surface state of the 3–√×3–√R300
                      BiCu2 monatomic alloy by scanning tunneling spectroscopy
                      (STS) and density functional theory (DFT). From dI/dU
                      spectra and calculated band structures, three hole-like
                      Rashba-split bands hybridized from distinct orbital
                      symmetries have been identified in the unoccupied energy
                      region. Because of the hexagonally deformed Fermi surface,
                      quasi-particle interference (QPI) mappings have resolved
                      scattering channels opened from interband transitions of
                      px,py (mj = 1/2) band. In contrast to the s,pz-derived
                      band, the hexagonal warping is predominately accompanied by
                      substantial out-of-plane spin polarization Sz up to $24\%$
                      in the dispersion of px,py (mj = 1/2) band with an
                      in-plane orbital symmetry.},
      cin          = {PGI-1 / IAS-1 / JARA-FIT / JARA-HPC},
      ddc          = {530},
      cid          = {I:(DE-Juel1)PGI-1-20110106 / I:(DE-Juel1)IAS-1-20090406 /
                      $I:(DE-82)080009_20140620$ / $I:(DE-82)080012_20140620$},
      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:000597293600002},
      doi          = {10.1038/s41535-020-00293-3},
      url          = {https://juser.fz-juelich.de/record/888463},
}