標題: Magnetic ground state and transition of a quantum multiferroic LiCu(2)O(2)
作者: Huang, S. W.
Huang, D. J.
Okamoto, J.
Mou, C. Y.
Wu, W. B.
Yeh, K. W.
Chen, C. L.
Wu, M. K.
Hsu, H. C.
Chou, F. C.
Chen, C. T.
電子物理學系
物理研究所
Department of Electrophysics
Institute of Physics
公開日期: 15-Aug-2008
摘要: Based on resonant soft x-ray magnetic scattering, we report that LiCu(2)O(2) exhibits a large interchain coupling which suppresses quantum fluctuations along spin chains, and a quasi-2D short-range magnetic order prevails at temperatures above the magnetic transition. These observations unravel the fact that the ground state of LiCu(2)O(2) possesses long-range 2D-like incommensurate magnetic order rather than being a gapped spin liquid as expected from the nature of quantum spin-1/2 chains. In addition, the spin coupling along the c axis is found to be essential for inducing electric polarization.
URI: http://dx.doi.org/10.1103/PhysRevLett.101.077205
http://hdl.handle.net/11536/8466
ISSN: 0031-9007
DOI: 10.1103/PhysRevLett.101.077205
期刊: PHYSICAL REVIEW LETTERS
Volume: 101
Issue: 7
起始頁: 0
結束頁: 0
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