Spin structure factor of the frustrated quantum magnet Cs2CuCl4

被引：32

作者：

Dalidovich, Denis ^{[1
]}

Sknepnek, Rastko ^{[1
]}

Berlinsky, A. John ^{[1
]}

Zhang, Junhua ^{[1
]}

Kallin, Catherine ^{[1
]}

机构：

[1] McMaster Univ, Dept Phys & Astron, Hamilton, ON L8S 4M1, Canada

来源：

PHYSICAL REVIEW B | 2006年 / 73卷 / 18期

关键词：

D O I：

10.1103/PhysRevB.73.184403

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The ground state properties and neutron structure factor for the two-dimensional antiferromagnet on the triangular lattice, with unidirectional anisotropy in the nearest-neighbor exchange couplings and a weak Dzyaloshinskii-Moriya (DM) interaction, are studied. This Hamiltonian has been used to interpret neutron scattering measurements on the spin 1/2 spiral spin-density-wave system, Cs2CuCl4 [R. Coldea , Phys. Rev. B 68, 134424 (2003)]. Calculations are performed using a 1/S expansion, taking into account interactions between spin waves. The ground state energy, the shift of the ordering wave vector, Q, and the local magnetization are all calculated to order 1/S-2. The neutron structure factor, obtained using anharmonic spin-wave Green's functions to order 1/S, is shown to be in reasonable agreement with published neutron data, provided that slightly different parameters are used for the exchange and DM interactions than those inferred from measurements in high magnetic field.

引用

页数：12

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