Quasi-one-dimensional spin dynamics in LiV 2O 4: One-to-three-dimensional crossover as a possible origin of heavy fermion state

Ryosuke Kadono, Akihiro Koda, Wataru Higemoto, Kazuki Ohishi, Hiroaki Ueda, Chiharu Urano, Shin Ichiro Kondo, Minoru Nohara, Hidenori Takagi

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Spin fluctuation in LiV 2O 4 is revisited by examining the earlier result of muon spin rotation/relaxation measurement. Instead of the relationship for the localized electron limit, that between muon depolarization rate and spin fluctuation rate (ν D) for itinerant electron systems is used to reanalyze data, which reveals that ν D varies linearly with temperature (ν D α T) over a range 10 8-10 12 s -1 for 0:02 ≤ T < 10 2 K. Such a linear T behavior as well as the magnitude of ν D is fully consistent with the behavior of magnetic relaxation rate previously observed by inelastic neutron scattering (INS), demonstrating that μSR and INS have a common time window over a fluctuation spectrum. The linear T dependence of ν D is understood as a specific feature predicted by a Hubbard model for intersecting one-dimensional (1D) chains. This quasi-1D character, which is coexistent with enhanced uniform susceptibility at low temperatures, supports the scenario of 1D-to-3D crossover for the microscopic origin of heavy-fermion behavior in LiV 2O 4.

Original languageEnglish
Article number014709
Journaljournal of the physical society of japan
Volume81
Issue number1
DOIs
Publication statusPublished - Jan 1 2012

Keywords

  • Geometrical frustration
  • Heavy fermion
  • Intersecting Hubbard chains
  • Muon spin rotation
  • Quasi-1D spin dynamics

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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