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@ARTICLE{Fedchenko:602589,
      author       = {Fedchenko, Olena and Minár, Jan and Akashdeep, Akashdeep
                      and D’Souza, Sunil Wilfred and Vasilyev, Dmitry and Tkach,
                      Olena and Odenbreit, Lukas and Nguyen, Quynh and Kutnyakhov,
                      Dmytro and Wind, Nils and Wenthaus, Lukas and Scholz, Markus
                      and Rossnagel, Kai and Hoesch, Moritz and Aeschlimann,
                      Martin and Stadtmüller, Benjamin and Kläui, Mathias and
                      Schoenhense, Gerd and Jungwirth, Tomas and Hellenes, Anna
                      Birk and Jakob, Gerhard and Šmejkal, Libor and Sinova,
                      Jairo and Elmers, Hans-Joachim},
      title        = {{O}bservation of time-reversal symmetry breaking in the
                      band structure of altermagnetic {R}u{O}$_2$},
      journal      = {Science advances},
      volume       = {10},
      number       = {5},
      issn         = {2375-2548},
      address      = {Washington, DC [u.a.]},
      publisher    = {Assoc.},
      reportid     = {PUBDB-2024-00665, arXiv:2306.02170},
      pages        = {eadj4883},
      year         = {2024},
      note         = {This work was funded by Deutsche Forschungsgemeinschaft
                      (DFG) grant no. TRR 173 268565370 (projects A02, A03, A05,
                      and B02), by the Bundesministerium für Bildung und
                      Forschung (BMBF) (projects 05K22UM1 and 05K22UM4), by EU FET
                      Open RIA grant no. 766566, and by Grant Agency of the Czech
                      Republic grant no. 19-28375X. J.M. and S.W.D.S. would like
                      to thank QM4ST project financed by the Ministry of
                      Education, Youth and Sports of Czech Republic, project no.
                      $CZ.02.01.01/00/22_008/0004572.$ Q.N. acknowledges support
                      by the Q-FARM Bloch Fellowship and the U.S. Department of
                      Energy (DE-AC02-76SF00515).},
      abstract     = {Altermagnets are an emerging third elementary class of
                      magnets. Unlike ferromagnets, their distinct crystal
                      symmetries inhibit magnetization while, unlike
                      antiferromagnets, they promote strong spin polarization in
                      the band structure. The corresponding unconventional
                      mechanism of timereversal symmetry breaking without
                      magnetization in the electronic spectra has been regarded as
                      a primary signature of altermagnetism, but has not been
                      experimentally visualized to date. We directly observe
                      strong time-reversal symmetry breaking in the band structure
                      of altermagnetic RuO$_2$ by detecting magnetic circular
                      dichroism in angle-resolved photoemission spectra. Our
                      experimental results, supported by ab initio calculations,
                      establish the microscopic electronic-structure basis for a
                      family of novel phenomena and functionalities in fields
                      ranging from topological matter to spintronics, that are
                      based on the unconventional time-reversal symmetry breaking
                      in altermagnets.},
      cin          = {DOOR ; HAS-User / FS-FLASH / FS-FLASH-O / FS-SXQM /
                      FS-PETRA-S},
      ddc          = {500},
      cid          = {I:(DE-H253)HAS-User-20120731 / I:(DE-H253)FS-FLASH-20140814
                      / I:(DE-H253)FS-FLASH-O-20160930 /
                      I:(DE-H253)FS-SXQM-20190201 /
                      I:(DE-H253)FS-PETRA-S-20210408},
      pnm          = {632 - Materials – Quantum, Complex and Functional
                      Materials (POF4-632) / 6G3 - PETRA III (DESY) (POF4-6G3) /
                      DFG project 290329451 - Spin+Optische Kontrolle: Optisches
                      Engineering von Zuständen mit geordnetem Spin auf der
                      fs-Zeitskala (A02) (290329451) / DFG project 290337465 -
                      Spin+A-Magnete: Computergestützte Spintronik mit
                      Altermagneten und Antiferromagneten (A03) (290337465) / DFG
                      project 290367035 - Spin+Symmetrie: Spin Drehmomente und
                      Polarisation induziert durch Kristallsymmetrie (A05)
                      (290367035) / DFG project 290396061 - Spin+Strom:
                      Drehimpulstransport durch Magnonen, Spins und Orbits (B02)
                      (290396061) / 05K22UM1 - Verbundprojekt 05K2022 -
                      OperandoHAXPES: Hartröntgen-Photoelektronenmikroskopie im
                      Real- und Impulsraum: Operando Systeme und
                      Quantenmaterialien. Teilprojekt 1. (BMBF-05K22UM1) /
                      05K22UM4 - Verbundprojekt 05K2022 - ToFPAXRIXS: In-situ
                      Kombination von RIXS und ARPES mit Flugzeit basierter
                      Photoelektronen Detektion. Teilprojekt 1. (BMBF-05K22UM4)},
      pid          = {G:(DE-HGF)POF4-632 / G:(DE-HGF)POF4-6G3 /
                      G:(GEPRIS)290329451 / G:(GEPRIS)290337465 /
                      G:(GEPRIS)290367035 / G:(GEPRIS)290396061 /
                      G:(DE-Ds200)BMBF-05K22UM1 / G:(DE-Ds200)BMBF-05K22UM4},
      experiment   = {EXP:(DE-H253)P-P04-20150101},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {pmid:38295181},
      eprint       = {2306.02170},
      howpublished = {arXiv:2306.02170},
      archivePrefix = {arXiv},
      SLACcitation = {$\%\%CITATION$ = $arXiv:2306.02170;\%\%$},
      UT           = {WOS:001185617600019},
      doi          = {10.1126/sciadv.adj4883},
      url          = {https://bib-pubdb1.desy.de/record/602589},
}