| Numéro |
J. Phys. IV France
Volume 114, April 2004
|
|
|---|---|---|
| Page(s) | 377 - 378 | |
| DOI | https://doi.org/10.1051/jp4:2004114088 | |
J. Phys. IV France 114 (2004) 377
DOI: 10.1051/jp4:2004114088
1H-NMR study of Mott insulator
-(ET)
2Cu2(CN)3 with
isotropic triangular lattice
Y. Shimizu1, 2, 1, K. Miyagawa2, 3, K. Oda2, K. Kanoda2, 3, M. Maesato1 and G. Saito1
1 Division of Chemistry, Graduate School of Science, Kyoto University, Oiwaketyo, Kitashirakawa, Sakyo-ku, Kyoto 606-8502, Japan
2 Department of Applied Physics, University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
3 CREST, Japan Science and Technology Corporation (JST), Kawaguchi, Saitama 332-0012, Japan
Abstract
1H NMR measurement was performed for a single crystal
sample of the organic Mott insulator
-(ET)
2Cu
2(CN)
3 with a nearly isotropic
triangular lattice. The 1H NMR spectra and the spin-lattice relaxation rate,
1/
T1, show no indication of magnetic transition down to 30 mK. However, the
line shows a slight but gradual broadening accompanied with only a moderate
increase in the spin-lattice relaxation rate, 1/
T1, below 4 K. It suggests a
possible change of spin dynamics of the frustrated quantum spins.
Key words. Triangular lattice - Mott insulator - spin liquid.
© EDP Sciences 2004