% IMPORTANT: The following is UTF-8 encoded.  This means that in the presence
% of non-ASCII characters, it will not work with BibTeX 0.99 or older.
% Instead, you should use an up-to-date BibTeX implementation like “bibtex8” or
% “biber”.

@ARTICLE{Go:891528,
      author       = {Go, Dongwook and Jo, Daegeun and Gao, Tenghua and Ando,
                      Kazuya and Blügel, Stefan and Lee, Hyun-Woo and Mokrousov,
                      Yuriy},
      title        = {{O}rbital {R}ashba effect in a surface-oxidized {C}u film},
      journal      = {Physical review / B},
      volume       = {103},
      number       = {12},
      issn         = {2469-9969},
      address      = {Woodbury, NY},
      publisher    = {Inst.77671},
      reportid     = {FZJ-2021-01581},
      pages        = {L121113},
      year         = {2021},
      abstract     = {Recent experimental observation of an unexpectedly large
                      current-induced spin-orbit torque in surface oxidized Cu on
                      top of a ferromagnet pointed to a possibly prominent role of
                      the orbital Rashba effect (ORE) in this system. Here, we use
                      first principles methods to investigate the ORE in a system
                      of oxygen monolayer deposited on top of a Cu(111) film. We
                      show that surface oxidization of the Cu film leads to a
                      gigantic enhancement of the ORE near the Fermi energy. The
                      resulting chiral orbital texture in the momentum space is
                      exceptionally strong, reaching as much as ∼0.5ℏ in
                      magnitude. We find that resonant hybridization between O p
                      states and Cu d states is responsible for the emergence of
                      the ORE at the interface. We also present a minimal model
                      that captures the emergence of the ORE through the pd
                      hybridization mechanism. We demonstrate that an application
                      of an external electric field to the system generates
                      colossal orbital Hall currents which are an order of
                      magnitude larger than the spin Hall currents found in heavy
                      metals. This implies that the “orbital torque” mechanism
                      may be significant in surface oxidized Cu/ferromagnet
                      structures. Our results encourage an experimental
                      verification of the rich orbital physics in surface oxidized
                      Cu films through optical measurements such as angle-resolved
                      photoemission spectroscopy and momentum microscopy.},
      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          = {521 - Quantum Materials (POF4-521)},
      pid          = {G:(DE-HGF)POF4-521},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000646179600003},
      doi          = {10.1103/PhysRevB.103.L121113},
      url          = {https://juser.fz-juelich.de/record/891528},
}