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@ARTICLE{Puntel:613152,
      author       = {Puntel, Denny and Kutnyakhov, Dmytro and Wenthaus, Lukas
                      and Scholz, Markus and Wind, Nils and Heber, Michael and
                      Brenner, Günter and Gu, Genda and Cava, Robert J. and
                      Bronsch, Wibke and Cilento, Federico and Parmigiani, Fulvio
                      and Pressacco, Federico},
      title        = {{O}ut-of-equilibrium charge redistribution in a
                      copper-oxide based superconductor by time-resolved {X}-ray
                      photoelectron spectroscopy},
      journal      = {Scientific reports},
      volume       = {14},
      number       = {1},
      issn         = {2045-2322},
      address      = {[London]},
      publisher    = {Macmillan Publishers Limited, part of Springer Nature},
      reportid     = {PUBDB-2024-05578},
      pages        = {8775},
      year         = {2024},
      abstract     = {Charge-transfer excitations are of paramount importance for
                      understanding the electronic structure of copper-oxide based
                      high-temperature superconductors. In this study, we
                      investigate the response of a $Bi_2Sr_2CaCu_2O_{8+\delta}$
                      crystal to the charge redistribution induced by an infrared
                      ultrashort pulse. Element-selective time-resolved core-level
                      photoelectron spectroscopy with a high energy resolution
                      allows disentangling the dynamics of oxygen ions with
                      different coordination and bonds thanks to their different
                      chemical shifts. Our experiment shows that the O 1s
                      component arising from the Cu–O planes is significantly
                      perturbed by the infrared light pulse. Conversely, the
                      apical oxygen, also coordinated with Sr ions in the Sr-O
                      planes, remains unaffected. This result highlights the
                      peculiar behavior of the electronic structure of the Cu–O
                      planes. It also unlocks the way to study the
                      out-of-equilibrium electronic structure of
                      copper-oxide-based high-temperature superconductors by
                      identifying the O 1s core-level emission originating from
                      the oxygen ions in the Cu–O planes. This ability could be
                      critical to gain information about the strongly-correlated
                      electron ultrafast dynamical mechanisms in the Cu–O plane
                      in the normal and superconducting phases.},
      cin          = {FS-LA / DOOR ; HAS-User / FS-FLASH-O / FS-FLASH-B /
                      FS-FLASH / $XFEL_E2_SXP$},
      ddc          = {600},
      cid          = {I:(DE-H253)FS-LA-20130416 / I:(DE-H253)HAS-User-20120731 /
                      I:(DE-H253)FS-FLASH-O-20160930 /
                      I:(DE-H253)FS-FLASH-B-20160930 /
                      I:(DE-H253)FS-FLASH-20140814 /
                      $I:(DE-H253)XFEL_E2_SXP-20240106$},
      pnm          = {632 - Materials – Quantum, Complex and Functional
                      Materials (POF4-632) / 6G2 - FLASH (DESY) (POF4-6G2) /
                      FS-Proposal: F-20200784 EC (F-20200784-EC) / 05K22FK2 -
                      Verbundprojekt 05K2022 - 10K-THz-k-ToF: 10K
                      ToF-Impulsmikroskop für FLASH mit Terahertz Anregung und
                      Raumladungsunterdrückung. Teilprojekt 2. (BMBF-05K22FK2) /
                      SFB 925 B02 - Ultraschnelle Dynamik in stark korrelierten
                      Systemen (B02) (201270818) / CALIPSOplus - Convenient Access
                      to Light Sources Open to Innovation, Science and to the
                      World (730872)},
      pid          = {G:(DE-HGF)POF4-632 / G:(DE-HGF)POF4-6G2 /
                      G:(DE-H253)F-20200784-EC / G:(DE-Ds200)BMBF-05K22FK2 /
                      G:(GEPRIS)201270818 / G:(EU-Grant)730872},
      experiment   = {EXP:(DE-H253)F-PG2-20150101},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {38627427},
      UT           = {WOS:001207590500018},
      doi          = {10.1038/s41598-024-56440-4},
      url          = {https://bib-pubdb1.desy.de/record/613152},
}