Magnetic ground state and transition of a quantum multiferroic LiCu2O2

被引：29
作者：
Huang, S. W. [1 ,2 ]
Huang, D. J. [1 ,2 ,3 ]
Okamoto, J. [1 ]
Mou, C. Y. [3 ,4 ]
Wu, W. B. [1 ]
Yeh, K. W.
Chen, C. L.
Wu, M. K.
Hsu, H. C. [5 ,6 ]
Chou, F. C. [1 ,5 ]
Chen, C. T. [1 ]
机构：
[1] Natl Synchrotron Radiat Res Ctr, Hsinchu 30076, Taiwan
[2] Natl Chiao Tung Univ, Dept Electrophys, Hsinchu 30010, Taiwan
[3] Natl Chiao Tung Univ, Dept Phys, Hsinchu 30013, Taiwan
[4] Natl Ctr Theoret Sci, Div Phys, Hsnichu 30013, Taiwan
[5] Natl Taiwan Univ, Ctr Condensed Matter Sci, Taipei 10617, Taiwan
[6] Natl Taiwan Normal Univ, Dept Phys, Taipei 11677, Taiwan
来源：
PHYSICAL REVIEW LETTERS | 2008年 / 101卷 / 07期
关键词：
D O I：
10.1103/PhysRevLett.101.077205
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Based on resonant soft x-ray magnetic scattering, we report that LiCu2O2 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 LiCu2O2 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.
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页数：4
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