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@ARTICLE{Zayed:838518,
      author       = {Zayed, M. E. and Rüegg, Ch. and Larrea J., J. and
                      Läuchli, A. M. and Panagopoulos, C. and Saxena, S. S. and
                      Ellerby, M. and McMorrow, D. F. and Strässle, Th. and
                      Klotz, S. and Hamel, G. and Sadykov, R. A. and Pomjakushin,
                      V. and Boehm, M. and Jiménez–Ruiz, M. and Schneidewind,
                      A. and Pomjakushina, E. and Stingaciu, M. and Conder, K. and
                      Rønnow, H. M.},
      title        = {4-spin plaquette singlet state in the
                      {S}hastry–{S}utherland compound
                      {S}r{C}u$_{2}$({BO}$_{3}$)$_{2}$},
      journal      = {Nature physics},
      volume       = {13},
      number       = {10},
      issn         = {1745-2481},
      address      = {Basingstoke},
      publisher    = {Nature Publishing Group},
      reportid     = {FZJ-2017-07110},
      pages        = {962 - 966},
      year         = {2017},
      abstract     = {The study of interacting spin systems is of fundamental
                      importance for modern condensed-matter physics. On
                      frustrated lattices, magnetic exchange interactions cannot
                      be simultaneously satisfied, and often give rise to
                      competing exotic ground states1. The frustrated
                      two-dimensional Shastry–Sutherland lattice2 realized by
                      SrCu2(BO3)2 (refs 3,4) is an important test case for our
                      understanding of quantum magnetism. It was constructed to
                      have an exactly solvable 2-spin dimer singlet ground state
                      within a certain range of exchange parameters and
                      frustration. While the exact dimer state and the
                      antiferromagnetic order at both ends of the phase diagram
                      are well known, the ground state and spin correlations in
                      the intermediate frustration range have been widely
                      debated2,4,5,6,7,8,9,10,11,12,13,14. We report here the
                      first experimental identification of the conjectured
                      plaquette singlet intermediate phase in SrCu2(BO3)2. It is
                      observed by inelastic neutron scattering after pressure
                      tuning to 21.5 kbar. This gapped singlet state leads to a
                      transition to long-range antiferromagnetic order above
                      40 kbar, consistent with the existence of a deconfined
                      quantum critical point.},
      cin          = {JCNS (München) ; Jülich Centre for Neutron Science JCNS
                      (München) ; JCNS-FRM-II / JCNS-2},
      ddc          = {530},
      cid          = {I:(DE-Juel1)JCNS-FRM-II-20110218 /
                      I:(DE-Juel1)JCNS-2-20110106},
      pnm          = {6G15 - FRM II / MLZ (POF3-6G15) / 6G4 - Jülich Centre for
                      Neutron Research (JCNS) (POF3-623)},
      pid          = {G:(DE-HGF)POF3-6G15 / G:(DE-HGF)POF3-6G4},
      experiment   = {EXP:(DE-MLZ)PANDA-20140101},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000412181200016},
      doi          = {10.1038/nphys4190},
      url          = {https://juser.fz-juelich.de/record/838518},
}