Trimer v 3+ spin singlet state and pseudo gap in LiVS 2 studied by 51v and 7Li nuclear magnetic resonance

Tetsu Tanaka, Yu Kawasaki, Shigeki Endou, Satoshi Kimura, Yukiichi Ideta, Yutaka Kishimoto, Takashi Ohno, Naoyuki Katayama, Minoru Nohara, Hidenori Takagi

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4 Citations (Scopus)

Abstract

To clarify the electronic state in a two-dimensional triangular lattice LiVS 2, we have performed 51V- and 7Li-NMR measurements. Below the phase transition temperature T c of about 310 K from the paramagnetic state to a nonmagnetic state, the Knight shift of both 51V and 7Li does not depend on temperature. The 51V and 7Li spin-lattice relaxation rates 1/T 1 show the exponential temperature dependence below T c, which indicates a gap structure of the electronic state. These results are in agreement with a trimer singlet of V 3+ spins below T c. The increase in 7Li 1/T 1 above T c indicates the existence of the pseudo gap and agrees with the increase in paramagnetic susceptibility with increasing temperature and with the small entropy change at T c compared with that in LiVO 2.

Original languageEnglish
Article number054709
Journaljournal of the physical society of japan
Volume78
Issue number5
DOIs
Publication statusPublished - May 1 2009
Externally publishedYes

Keywords

  • Knight shift
  • Livs
  • Spin-lattice relaxation
  • Trimer spin singlet
  • Two-dimensional triangular lattice

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Tanaka, T., Kawasaki, Y., Endou, S., Kimura, S., Ideta, Y., Kishimoto, Y., Ohno, T., Katayama, N., Nohara, M., & Takagi, H. (2009). Trimer v 3+ spin singlet state and pseudo gap in LiVS 2 studied by 51v and 7Li nuclear magnetic resonance. journal of the physical society of japan, 78(5), [054709]. https://doi.org/10.1143/JPSJ.78.054709