Non-equilibrium relaxation study for frustrated spin system with successive phase transitions

被引：16

作者：

Ogawa, K ^{[1
]}

Ozeki, Y ^{[1
]}

机构：

[1] Tokyo Inst Technol, Dept Phys, Tokyo 1528551, Japan

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 2000年 / 69卷 / 09期

关键词：

non-equilibrium relaxation; critical phenomena; Monte Carlo simulation; BEG model; universality;

D O I：

10.1143/JPSJ.69.2808

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The non-equilibrium relaxation method (NER) is applied to a frustrated spin system with competitive interactions. The critical point and critical exponents are estimated accurately for the Blume-Emery-Griffiths model in three dimensions. It is applied to the region where successive transitions of PM-FM-PM-SQ phases occur: we denote paramagnetic (PM), ferromagnetic (Fh I) and staggered quadrupole (SQ) phases. With the analysis for relaxation of fluctuations, we can estimate various critical exponents. The result indicates that all transitions belong to the Ising universality class in three dimensions. It is found that the NER method is useful to analyze the critical phenomena for complex systems in which equilibrium simulation is even difficult.

引用

收藏

页码：2808 / 2815

页数：8

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