SPIN DYNAMICS OF A ONE-DIMENSIONAL ISING-LIKE ANTIFERROMAGNET IN A TRANSVERSE MAGNETIC-FIELD

被引:4
|
作者
MURAO, K
MATSUBARA, F
INAWASHIRO, S
机构
[1] Department of Applied Physics, Tohoku University
关键词
QUASI ONE DIMENSIONAL ANTIFERROMAGNET; ISING-LIKE ANTIFERROMAGNET; SPIN DYNAMICS; TRANSVERSE MAGNETIC FIELD; DOMAIN WALLS; CSCOCL3;
D O I
10.1143/JPSJ.64.275
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
The effect of the transverse magnetic field h(x) on the spin dynamics of a one dimensional Ising-like S=1/2 antiferromagnet is discussed. Based on a picture of the propagating domain walls, we obtain dynamical spin correlation functions along the magnetic field S-xx(k, omega) and perpendicular to it S-yy(k, omega). A remarkable effect is seen in S-yy(k, omega) for pi/2 less than or equal to k less than or equal to pi, where the spectral weight moves toward the low energy side with the increase of h(x). The theory is applied to the analysis of the spin dynamics of CsCoCl3, taking into account weak interchain interactions. Zeeman ladders occur and S-yy(k, omega) for k similar to pi exhibits a novel feature under the existence of h(x).
引用
收藏
页码:275 / 290
页数:16
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