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@ARTICLE{Lytvynenko:644508,
      author       = {Lytvynenko, Y. and Akashdeep, A. and Vo, T. P. and Tkach,
                      O. and Chernov, S. V. and Gloskovskii, A. and Schlueter, C.
                      and Luo, C. and Ukleev, V. and Radu, F. and Kronast, F. and
                      Hiroto, T. and Winkelmann, A. and Minár, J. and Kläui, M.
                      and Schoenhense, Gerd and Jakob, G. and Elmers, Hans-Joachim
                      and Fedchenko, O.},
      title        = {{M}agnetic circular dichroism in core-level x-ray
                      photoelectron spectroscopy of altermagnetic {R}u{O}$_2$
                      films},
      journal      = {Physical review / B},
      volume       = {113},
      number       = {1},
      issn         = {2469-9950},
      address      = {Woodbury, NY},
      publisher    = {Inst.},
      reportid     = {PUBDB-2026-00367},
      pages        = {014403},
      year         = {2026},
      abstract     = {While ferromagnetism and antiferromagnetism are
                      well-established classes of magnetic order, a third class of
                      collinear magnetic order, termed altermagnetism, has
                      recently attracted scientific interest. We measured magnetic
                      circular dichroism (MCD) in core-level photoemission (XPS)
                      at the Ru 2⁢𝑝$_{3/2}$ and 2⁢𝑝$_{1/2}$ core levels
                      in epitaxial RuO$_2$⁢(110)/TiO$_2$⁢(110)films using
                      circularly polarized x rays at 6 keV, as well as x-ray
                      magnetic circular dichroism (XMCD) in resonant x-ray
                      absorption at the Ru M$_{3/2}$(3⁢𝑝$_{3/2}$ and 3⁢𝑝
                      $_{1/2}$) edges. Charge transfer multiplet calculations show
                      that the MCD-XPS and the XMCD can be explained by an
                      altermagnetic locking of Ru magnetic moments and a distorted
                      crystal field orientation. The distortion is caused by the
                      epitaxial strain. The collinear magnetic moments in
                      RuO$_2$occupy sublattice sites with distorted octahedral
                      crystal fields that are rotated by 90∘with respect to each
                      other. A change in the sign of the MCD-XPS at different
                      sample positions indicates the presence of altermagnetic
                      domains with the size of around hundreds of micrometers.},
      cin          = {DOOR ; HAS-User / FS-PETRA-S},
      ddc          = {530},
      cid          = {I:(DE-H253)HAS-User-20120731 /
                      I:(DE-H253)FS-PETRA-S-20210408},
      pnm          = {632 - Materials – Quantum, Complex and Functional
                      Materials (POF4-632) / 6G3 - PETRA III (DESY) (POF4-6G3) /
                      05K22UM4 - Verbundprojekt 05K2022 - ToFPAXRIXS: In-situ
                      Kombination von RIXS und ARPES mit Flugzeit basierter
                      Photoelektronen Detektion. Teilprojekt 1. (BMBF-05K22UM4) /
                      05K22UM1 - Verbundprojekt 05K2022 - OperandoHAXPES:
                      Hartröntgen-Photoelektronenmikroskopie im Real- und
                      Impulsraum: Operando Systeme und Quantenmaterialien.
                      Teilprojekt 1. (BMBF-05K22UM1) / DFG project
                      G:(GEPRIS)290319996 - Spin+Bahn-Wechselwirkung: Orbitronik
                      und Spin-Bahn Effekte (A01) (290319996) / DFG project
                      G:(GEPRIS)290329451 - Spin+Optische Kontrolle: Optisches
                      Engineering von Zuständen mit geordnetem Spin auf der
                      fs-Zeitskala (A02) (290329451) / DFG project
                      G:(GEPRIS)290396061 - Spin+Strom: Drehimpulstransport durch
                      Magnonen, Spins und Orbits (B02) (290396061) / DFG project
                      G:(GEPRIS)444821616 - Impuls-Mikroskopie von stark
                      korrelierten Systemen unter mechanischer Dehnung (B04)
                      (444821616) / SWAN-on-chip - Low power spintronics wireless
                      autonomous node (SWAN) integrated circuits developed via
                      spintronics technology accelerator platform (101070287)},
      pid          = {G:(DE-HGF)POF4-632 / G:(DE-HGF)POF4-6G3 /
                      G:(DE-Ds200)BMBF-05K22UM4 / G:(DE-Ds200)BMBF-05K22UM1 /
                      G:(GEPRIS)290319996 / G:(GEPRIS)290329451 /
                      G:(GEPRIS)290396061 / G:(GEPRIS)444821616 /
                      G:(EU-Grant)101070287},
      experiment   = {EXP:(DE-H253)P-P22-20150101},
      typ          = {PUB:(DE-HGF)16},
      doi          = {10.1103/x2h4-rtky},
      url          = {https://bib-pubdb1.desy.de/record/644508},
}