Spin-1/2 Kagomé-Like Lattice in Volborthite Cu3V2O7(OH)2·2H2O

Zenji Hiroi, Masafumi Hanawa, Naoya Kobayashi, Minoru Nohara, Hidenori Takagi, Yoshitomo Kato, Masashi Takigawa

Research output: Contribution to journalArticlepeer-review

216 Citations (Scopus)

Abstract

A novel cuprate Volborthite. Cu3V2O7(OH)2·2H2O. containing an S-1/2 (Cu2+ spin) kagomé-like lattice is studied by magnetic susceptibility, specific heat, and 51V NMR measurements. Signs for neither long-range order nor spin-gapped singlet ground states are detected down to 1.8 K. in spite of large antiferromagnetic couplings of ∼100 K between Cu spins forming a two-dimensional kagomé-like network. It is suggested that Volborthite represents a system close to a quantum critical point between classical long-range ordered and quantum disordered phases.

Original languageEnglish
Pages (from-to)3377-3384
Number of pages8
Journaljournal of the physical society of japan
Volume70
Issue number11
DOIs
Publication statusPublished - Nov 2001
Externally publishedYes

Keywords

  • Cuprate
  • Kagomé
  • Lattice
  • Magnetic susceptibility
  • NMR
  • Specific heat

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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