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@ARTICLE{Min:639799,
      author       = {Min, Chul Hee and Müller, S. and Choi, W. J. and Dudy, L.
                      and Zabolotnyy, V. and Heber, M. and Denlinger, J. D. and
                      Kang, C.-J. and Kalläne, M. and Wind, N. and Scholz, M. and
                      Lee, T. L. and Schlueter, C. and Gloskovskii, A. and Rienks,
                      E. D. L. and Hinkov, V. and Bentmann, H. and Kwon, Y. S. and
                      Reinert, F. and Kim, H.-D. and Rossnagel, K.},
      title        = {{P}olaronic {Q}uasiparticles in the {V}alence-{T}ransition
                      {C}ompound {T}m{S}e$_{1−x}${T}e$_x$},
      journal      = {Physical review letters},
      volume       = {135},
      number       = {18},
      issn         = {0031-9007},
      address      = {College Park, Md.},
      publisher    = {APS},
      reportid     = {PUBDB-2025-04673},
      pages        = {186501},
      year         = {2025},
      abstract     = {Exotic quasiparticle states have been proposed in
                      mixed-valent compounds exhibiting valence transitions.
                      However, clear spectroscopic evidence identifying these
                      states has remained elusive. Using synchrotron-based hard
                      x-ray and extreme ultraviolet photoemission spectroscopy, we
                      have probed the Tm 3⁢𝑑 and 4⁢𝑓 emissions in
                      TmSe$_{1−x}$Te$_x$, where a Te concentration-dependent
                      semimetal–insulator transition occurs alongside the
                      valence transition. Our photoemission results, which are
                      characteristic of the bulk, track this combined transition
                      across the critical concentration ($𝑥_𝑐$ =0.29).
                      Notably, our results reveal a noninteger valence for the
                      insulating phase and a novel quasiparticle excitation in the
                      semimetallic phase: a Holstein polaron that extends beyond
                      the standard periodic Anderson model},
      cin          = {FS DOOR-User / FS-SXQM / FS-PET-S},
      ddc          = {530},
      cid          = {$I:(DE-H253)FS_DOOR-User-20241023$ /
                      I:(DE-H253)FS-SXQM-20190201 / I:(DE-H253)FS-PET-S-20190712},
      pnm          = {632 - Materials – Quantum, Complex and Functional
                      Materials (POF4-632) / 6G3 - PETRA III (DESY) (POF4-6G3) /
                      FS-Proposal: I-20200225 (I-20200225) / DFG project
                      G:(GEPRIS)390858490 - EXC 2147: Komplexität und Topologie
                      in Quantenmaterialien (CT.QMAT) (390858490) / SFB 1170 C06 -
                      Topologische Phasen in Schwere-Fermionen-Isolatoren und
                      -Halbmetallen, sowie die Be-deutung von Zeitumkehr- und
                      Inversionssymmetrie (C06) (276846545) / SFB 1170 A01 -
                      Einfluss von Symmetrie und Korrelationseffekten in der
                      elektronischen Struktur epitaktischer topologischer
                      Isolatoren (A01) (276799616) / CALIPSOplus - Convenient
                      Access to Light Sources Open to Innovation, Science and to
                      the World (730872) / 05K19FK4 - Verbundprojekt 05K2019 -
                      QM-MBE-SXPES: Experimentelle Apparatur zur
                      Molekularstrahlepitaxie komplexer Quantenmaterialien für
                      Photoelektronenspektroskopie im Weichröntgenbereich am
                      Strahlrohr P04 von PETRA III. Teilprojekt 1.
                      (BMBF-05K19FK4)},
      pid          = {G:(DE-HGF)POF4-632 / G:(DE-HGF)POF4-6G3 /
                      G:(DE-H253)I-20200225 / G:(GEPRIS)390858490 /
                      G:(GEPRIS)276846545 / G:(GEPRIS)276799616 /
                      G:(EU-Grant)730872 / G:(DE-Ds200)BMBF-05K19FK4},
      experiment   = {EXP:(DE-H253)P-P04-20150101 / EXP:(DE-H253)P-P22-20150101},
      typ          = {PUB:(DE-HGF)16},
      doi          = {10.1103/72dv-ynm2},
      url          = {https://bib-pubdb1.desy.de/record/639799},
}