Improved spin dynamics simulations of magnetic excitations

被引:10
作者
Landau, DP [1 ]
Tsai, SH
Krech, M
Bunker, A
机构
[1] Univ Georgia, Ctr Simulat Phys, Athens, GA 30602 USA
[2] Max Planck Inst Polymerforsch, Mainz, Germany
来源
INTERNATIONAL JOURNAL OF MODERN PHYSICS C | 1999年 / 10卷 / 08期
关键词
spin systems; spin dynamics simulations; equations of motion;
D O I
10.1142/S0129183199001327
中图分类号
TP39 [计算机的应用];
学科分类号
081203 ; 0835 ;
摘要
Using Suzuki-Trotter decompositions of exponential operators we describe new algorithms for the numerical integration of the equations of motion for classical spin systems. These techniques conserve spin length exactly and, in special cases, also conserve the energy and maintain time reversibility. We investigate integration schemes of up to eighth order and show that these new algorithms can be used with much larger time steps than a well established predictor-corrector method. These methods may lead to a substantial speedup of spin dynamics simulations, however, the choice of which order method to use is not always straightforward.
引用
收藏
页码:1541 / 1551
页数:11
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