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@ARTICLE{Go:1020240,
      author       = {Go, Dongwook and Jo, Daegeun and Kim, Kyoung-Whan and Lee,
                      Soogil and Kang, Min-Gu and Park, Byong-Guk and Blügel,
                      Stefan and Lee, Hyun-Woo and Mokrousov, Yuriy},
      title        = {{L}ong-{R}ange {O}rbital {T}orque by {M}omentum-{S}pace
                      {H}otspots},
      journal      = {Physical review letters},
      volume       = {130},
      number       = {24},
      issn         = {0031-9007},
      address      = {College Park, Md.},
      publisher    = {APS},
      reportid     = {FZJ-2023-05907},
      pages        = {246701},
      year         = {2023},
      abstract     = {While it is often assumed that the orbital response is
                      suppressed and short ranged due to strong crystal field
                      potential and orbital quenching, we show that the orbital
                      response can be remarkably long ranged in ferromagnets. In a
                      bilayer consisting of a nonmagnet and a ferromagnet, spin
                      injection from the interface results in spin accumulation
                      and torque in the ferromagnet, which rapidly oscillate and
                      decay by spin dephasing. In contrast, even when an external
                      electric field is applied only on the nonmagnet, we find
                      substantially long-ranged induced orbital angular momentum
                      in the ferromagnet, which can go far beyond the spin
                      dephasing length. This unusual feature is attributed to
                      nearly degenerate orbital characters imposed by the crystal
                      symmetry, which form hotspots for the intrinsic orbital
                      response. Because only the states near the hotspots
                      contribute dominantly, the induced orbital angular momentum
                      does not exhibit destructive interference among states with
                      different momentum as in the case of the spin dephasing.
                      This gives rise to a distinct type of orbital torque on the
                      magnetization, increasing with the thickness of the
                      ferromagnet. Such behavior may serve as critical long-sought
                      evidence of orbital transport to be directly tested in
                      experiments. Our findings open the possibility of using
                      long-range orbital response in orbitronic device
                      applications.},
      cin          = {PGI-1 / IAS-1 / JARA-HPC / JARA-FIT},
      ddc          = {530},
      cid          = {I:(DE-Juel1)PGI-1-20110106 / I:(DE-Juel1)IAS-1-20090406 /
                      $I:(DE-82)080012_20140620$ / $I:(DE-82)080009_20140620$},
      pnm          = {5211 - Topological Matter (POF4-521) / DFG project
                      437337265 - Spin+Optik: Theoretischer Entwurf von
                      antiferromagnetischer Optospintronik (A11) (437337265) / DFG
                      project 444844585 - Statische und dynamische Kopplung von
                      Gitter- und elektronischen Freiheitsgraden in magnetisch
                      geordneten Übergangsmetalldichalkogenieden (B06)
                      (444844585)},
      pid          = {G:(DE-HGF)POF4-5211 / G:(GEPRIS)437337265 /
                      G:(GEPRIS)444844585},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {37390424},
      UT           = {WOS:001019609700013},
      doi          = {10.1103/PhysRevLett.130.246701},
      url          = {https://juser.fz-juelich.de/record/1020240},
}