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@ARTICLE{Ma:904963,
      author       = {Ma, Zhen and Dong, Zhao-Yang and Wang, Jinghui and Zheng,
                      Shuhan and Ran, Kejing and Bao, Song and Cai, Zhengwei and
                      Shangguan, Yanyan and Wang, Wei and Boehm, M. and Steffens,
                      P. and Regnault, L.-P. and Wang, Xiao and Su, Yixi and Yu,
                      Shun-Li and Liu, Jun-Ming and Li, Jian-Xin and Wen,
                      Jinsheng},
      title        = {{D}isorder-induced broadening of the spin waves in the
                      triangular-lattice quantum spin liquid candidate
                      {Y}b{Z}n{G}a{O}$_4$},
      journal      = {Physical review / B},
      volume       = {104},
      number       = {22},
      issn         = {1098-0121},
      address      = {Woodbury, NY},
      publisher    = {Inst.},
      reportid     = {FZJ-2022-00277},
      pages        = {224433},
      year         = {2021},
      abstract     = {Disorder is important in the study of quantum spin liquids,
                      but its role on the spin dynamics remains elusive. Here, we
                      explore the disorder effect by investigating the
                      magnetic-field dependence of the low-energy magnetic
                      excitations in a triangular-lattice frustrated magnet
                      YbZnGaO4 with inelastic neutron scattering. With an
                      intermediate field of 2.5 T applied along the c axis, the
                      broad continuum at zero field becomes more smeared both in
                      energy and momentum. With a field up to 10 T, which fully
                      polarizes the magnetic moments, we observe clear spin-wave
                      excitations with a gap of ∼1.4meV comparable to the
                      bandwidth. However, the spectra are significantly broadened.
                      The excitation spectra both at zero and high fields can be
                      reproduced by performing classical Monte Carlo simulations
                      which take into account the disorder effect arising from the
                      random site mixing of nonmagnetic Zn2+ and Ga3+ ions. These
                      results elucidate the critical role of disorder in
                      broadening the magnetic excitation spectra and mimicking the
                      spin-liquid features in frustrated quantum magnets.},
      cin          = {JCNS-FRM-II / JCNS-2 / JCNS-4 / MLZ},
      ddc          = {530},
      cid          = {I:(DE-Juel1)JCNS-FRM-II-20110218 /
                      I:(DE-Juel1)JCNS-2-20110106 / I:(DE-Juel1)JCNS-4-20201012 /
                      I:(DE-588b)4597118-3},
      pnm          = {6G4 - Jülich Centre for Neutron Research (JCNS) (FZJ)
                      (POF4-6G4) / 632 - Materials – Quantum, Complex and
                      Functional Materials (POF4-632)},
      pid          = {G:(DE-HGF)POF4-6G4 / G:(DE-HGF)POF4-632},
      experiment   = {EXP:(DE-MLZ)External-20140101},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000753768800005},
      doi          = {10.1103/PhysRevB.104.224433},
      url          = {https://juser.fz-juelich.de/record/904963},
}