Dynamical properties of phonons in the XY spin chain coupled with lattices -: art. no. 094431

被引：1
|
作者：
Ye, F [1 ]
Ding, GH [1 ]
Xu, BW [1 ]
机构：
[1] Shanghai Jiao Tong Univ, Dept Phys, Shanghai 200030, Peoples R China
来源：
PHYSICAL REVIEW B | 2001年 / 64卷 / 09期
关键词：
D O I：
10.1103/PhysRevB.64.094431
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We study the dynamical properties of the phonons in the XY spin chain coupled with lattices subjected to the applied magnetic field with the path-integral approach. Dynamical structure factor is calculated in the presence of the magnetic field. A critical value of the bare pi -mode phonon frequency fl, is given such that for fl, <<Omega>(pi .c) the spin-Peierls transition is in the soft-mode regime and for Omega (pi) > Omega (pi .c) it is in the central-peak regime. We find that Omega (pi .c) depends on the magnitude of the applied magnetic field.
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页数：5
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