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@ARTICLE{Mijit:619418,
      author       = {Mijit, Emin and Duc, Fabienne and Mathon, Olivier and Rosa,
                      Angelika D. and Garbarino, Gaston and Irifune, Tetsuo and
                      Braithwaite, Daniel and Shitsevalova, Natalya and Strohm,
                      Cornelius},
      title        = {{T}emperature and pressure dependencies of {S}m valence in
                      {S}m{B}$_6$ {K}ondo insulator probed by x-ray absorption
                      spectroscopy},
      journal      = {Physica / B},
      volume       = {689},
      issn         = {0921-4526},
      address      = {Amsterdam},
      publisher    = {Elsevier},
      reportid     = {PUBDB-2024-07623},
      pages        = {416174},
      year         = {2024},
      abstract     = {Pressure and temperature induced valence changes in the
                      Kondo insulator SmB have been investigated using x-ray
                      absorption spectroscopy (XAS) along several isobaric cooling
                      runs and one isothermal compression. The average valence of
                      Sm at various pressure and temperature conditions is
                      extracted from high quality XAS data by peak fitting
                      procedures. The temperature dependence of the Sm valence at
                      ambient pressure shows changes of slope near the known
                      characteristic temperatures of gap formation (120 K) and the
                      in-gap state (50 K). At higher pressures the average valence
                      also shows similar temperature dependent trends upon cooling
                      but the slope changes are less pronounced. This behavior is
                      discussed in relation to the possible existence of an
                      underlying first order valence transition and its critical
                      end point. At constant temperature (T=20 K), the Sm valence
                      increases rapidly with pressure; however, it remains far
                      below the expected integer value (3+) near the onset of the
                      magnetic ordering and gap closure. In addition, the local
                      structure of SmB$_6$ at ambient conditions has been analyzed
                      using extended x-ray absorption fine structure.},
      cin          = {$XFEL_E1_HED$ / FS-HIBEF},
      ddc          = {530},
      cid          = {$I:(DE-H253)XFEL_E1_HED-20210408$ /
                      I:(DE-H253)FS-HIBEF-20240110},
      pnm          = {631 - Matter – Dynamics, Mechanisms and Control
                      (POF4-631) / ISABEL - Improving the sustainability of the
                      European Magnetic Field Laboratory (871106)},
      pid          = {G:(DE-HGF)POF4-631 / G:(EU-Grant)871106},
      experiment   = {EXP:(DE-MLZ)External-20140101},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:001254311900001},
      doi          = {10.1016/j.physb.2024.416174},
      url          = {https://bib-pubdb1.desy.de/record/619418},
}