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@ARTICLE{Psztorov:862180,
      author       = {Pásztorová, J. and Howell, A. and Songvilay, M. and
                      Sarte, P. M. and Rodriguez-Rivera, J. A. and
                      Arévalo-López, A. M. and Schmalzl, K. and Schneidewind, A.
                      and Dunsiger, S. R. and Singh, D. K. and Petrovic, C. and
                      Hu, R. and Stock, C.},
      title        = {{R}elaxing {K}ondo-screened {K}ramers doublets in
                      {C}e{R}h{S}i 3},
      journal      = {Physical review / B},
      volume       = {99},
      number       = {12},
      issn         = {2469-9950},
      address      = {Woodbury, NY},
      reportid     = {FZJ-2019-02528},
      pages        = {125144},
      year         = {2019},
      abstract     = {CeRhSi3 is a superconductor under pressure coexisting with
                      a weakly antiferromagnetic phase characterized by a Bragg
                      peak at →q0=(∼0.2,0,0.5) [N. Aso et al., J. Magn. Magn.
                      Mater. 310, 602 (2007)]. The compound is also a
                      heavy-fermion material with a large specific heat
                      coefficient γ=110 mJ mol−1K−2 and a high Kondo
                      temperature of TK=50 K, indicating CeRhSi3 is in a strongly
                      Kondo screened state. We apply high-resolution neutron
                      spectroscopy to investigate the magnetic fluctuations in the
                      normal phase, at ambient pressures, and at low temperatures.
                      We measure a commensurate dynamic response centered around
                      the →Q=(0,0,2) position that gradually evolves to H∼0.2
                      with decreasing temperature and/or energy transfers. The
                      response is broadened both in momentum and energy and is not
                      reminiscent of sharp spin wave excitations found in
                      insulating magnets where the electrons are localized. We
                      parametrize the excitation spectrum and temperature
                      dependence using a heuristic model utilizing the
                      random-phase approximation to couple relaxing Ce3+
                      ground-state Kramers doublets with a Kondo-like dynamic
                      response. With a Ruderman-Kittel-Kasuya-Yosida exchange
                      interaction within the ab plane and an increasing
                      single-site susceptibility, we can qualitatively reproduce
                      the neutron spectroscopic results in CeRhSi3 and, namely,
                      the trade-off between scattering at commensurate and
                      incommensurate positions. We suggest that the
                      antiferromagnetic phase in CeRhSi3 is driven by weakly
                      correlated relaxing localized Kramers doublets and that
                      CeRhSi3 at ambient pressures is on the border between a
                      Rudderman-Kittel-Yosida antiferromagnetic state and a
                      Kondo-screened phase where static magnetism is predominately
                      absent.},
      cin          = {JCNS-2 / PGI-4 / JARA-FIT / JCNS-ILL / JCNS-FRM-II},
      ddc          = {530},
      cid          = {I:(DE-Juel1)JCNS-2-20110106 / I:(DE-Juel1)PGI-4-20110106 /
                      $I:(DE-82)080009_20140620$ / I:(DE-Juel1)JCNS-ILL-20110128 /
                      I:(DE-Juel1)JCNS-FRM-II-20110218},
      pnm          = {144 - Controlling Collective States (POF3-144) / 524 -
                      Controlling Collective States (POF3-524) / 6212 - Quantum
                      Condensed Matter: Magnetism, Superconductivity (POF3-621) /
                      6213 - Materials and Processes for Energy and Transport
                      Technologies (POF3-621) / 6G4 - Jülich Centre for Neutron
                      Research (JCNS) (POF3-623)},
      pid          = {G:(DE-HGF)POF3-144 / G:(DE-HGF)POF3-524 /
                      G:(DE-HGF)POF3-6212 / G:(DE-HGF)POF3-6213 /
                      G:(DE-HGF)POF3-6G4},
      experiment   = {EXP:(DE-MLZ)PANDA-20140101 /
                      EXP:(DE-Juel1)ILL-IN12-20150421},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000462898900009},
      doi          = {10.1103/PhysRevB.99.125144},
      url          = {https://juser.fz-juelich.de/record/862180},
}