Correlation between spin helicity and an electric polarization vector in quantum-spin chain magnet LiCu2O2

被引：186

作者：

Seki, S. ^{[1
]}

Yamasaki, Y. ^{[1
]}

Soda, M. ^{[2
]}

Matsuura, M. ^{[2
]}

Hirota, K. ^{[2
]}

Tokura, Y. ^{[1
,3
,4
]}

机构：

[1] Univ Tokyo, Dept Appl Phys, Tokyo 1138656, Japan

[2] Univ Tokyo, Inst Solid State Phys, Kashiwa, Chiba 2778581, Japan

[3] Japan Sci & Technol Agcy, ERATO, Multiferro Project, Tokyo 1138656, Japan

[4] RIKEN, Cross Correlated Mat Res Grp, FRS, Wako, Saitama 3510198, Japan

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 100卷 / 12期

关键词：

D O I：

10.1103/PhysRevLett.100.127201

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Measurements of polarized neutron scattering were performed on a S=1/2 chain multiferroic LiCu2O2. In the ferroelectric ground state with the spontaneous polarization along the c axis, the existence of transverse spiral spin component in the bc plane was confirmed. When the direction of electric polarization is reversed, the vector spin chirality as defined by C-ij=S-i x S-j (i and j being the neighboring spin sites) is observed to be reversed, indicating that the spin-current model or the inverse Dzyaloshinskii-Moriya mechanism is applicable even to this e(g)-electron quantum-spin system. Differential scattering intensity of polarized neutrons shows a large discrepancy from that expected for the classical-spin bc-cycloidal structure, implying the effect of large quantum fluctuation.

引用

页数：4

共 21 条

[1] POLARIZATION EFFECTS IN MAGNETIC ELASTIC SCATTERING OF SLOW NEUTRONS [J].