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@ARTICLE{Figgemeier:624344,
      author       = {Figgemeier, T. and Ünzelmann, M. and Eck, P. and Schusser,
                      J. and Crippa, L. and Neu, J. N. and Geldiyev, B. and
                      Kagerer, P. and Buck, J. and Kalläne, M. and Hoesch, M. and
                      Rossnagel, K. and Siegrist, T. and Lim, L. -K. and Moessner,
                      R. and Sangiovanni, G. and Di Sante, D. and Reinert, F. and
                      Bentmann, H.},
      title        = {{T}omographic {I}maging of {O}rbital {V}ortex {L}ines in
                      {T}hree-{D}imensional {M}omentum {S}pace},
      reportid     = {PUBDB-2025-00813, arXiv:2402.10031},
      year         = {2024},
      abstract     = {We report the experimental discovery of orbital vortex
                      lines in the three-dimensional (3D) band structure of a
                      topological semimetal. Combining linear and circular
                      dichroism in soft x-ray angle-resolved photoemission
                      (SX-ARPES) with first-principles theory, we image the
                      winding of atomic orbital angular momentum, thereby
                      revealing - and determining the location of - lines of
                      vorticity in full 3D momentum space. Our observation of
                      momentum-space vortex lines with quantized winding number
                      establishes an analogue to real-space quantum vortices, for
                      instance, in type-II superconductors and certain
                      non-collinear magnets. These results establish multimodal
                      dichroism in SX-ARPES as an approach to trace 3D orbital
                      textures. Our present findings particularly constitute the
                      first imaging of non-trivial quantum-phase winding at line
                      nodes and may pave the way to new orbitronic phenomena in
                      quantum materials},
      cin          = {DOOR ; HAS-User / FS-PETRA-S / FS-SXQM},
      cid          = {I:(DE-H253)HAS-User-20120731 /
                      I:(DE-H253)FS-PETRA-S-20210408 /
                      I:(DE-H253)FS-SXQM-20190201},
      pnm          = {632 - Materials – Quantum, Complex and Functional
                      Materials (POF4-632) / 6G3 - PETRA III (DESY) (POF4-6G3) /
                      DFG project G:(GEPRIS)390858490 - EXC 2147: Komplexität und
                      Topologie in Quantenmaterialien (CT.QMAT) (390858490) / DFG
                      project G:(GEPRIS)258499086 - SFB 1170: Topologische und
                      korrelierte Elektronik in Ober- und Grenzflächen
                      ("ToCoTronics") (258499086) / BITMAP - aB-IniTio
                      calculations and MAchine learning for suPerconducting
                      collective phenomena in novel materials (897276)},
      pid          = {G:(DE-HGF)POF4-632 / G:(DE-HGF)POF4-6G3 /
                      G:(GEPRIS)390858490 / G:(GEPRIS)258499086 /
                      G:(EU-Grant)897276},
      experiment   = {EXP:(DE-H253)P-P04-20150101},
      typ          = {PUB:(DE-HGF)25},
      eprint       = {2402.10031},
      howpublished = {arXiv:2402.10031},
      archivePrefix = {arXiv},
      SLACcitation = {$\%\%CITATION$ = $arXiv:2402.10031;\%\%$},
      url          = {https://bib-pubdb1.desy.de/record/624344},
}