MULTICRITICAL POINT IN THE ONE-DIMENSIONAL QUANTUM COMPASS MODEL

被引：3
|
作者：
Aziziha, M. [1 ]
Motamedifar, M. [1 ]
Mahdavifar, S. [1 ]
机构：
[1] Univ Guilan, Dept Phys, Rasht 413351914, Iran
来源：
ACTA PHYSICA POLONICA B | 2013年 / 44卷 / 02期
关键词：
Analytic expressions - Compass models - Critical exponent - Finite size scaling - Jordan-Wigner transformation - Magnetic phase diagrams - Multicritical point - Spin-spin correlation functions;
D O I：
10.5506/APhysPolB.44.221
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The one-dimensional spin-1/2 quantum compass model is considered. There is a multicritical point in the ground state magnetic phase diagram of the model. By using the Jordan-Wigner transformation the diagonalized Hamiltonian is obtained and analytic expressions for the spin spin correlation functions are determined at the multicritical point. On the other hand, the critical exponent of the energy gap in the vicinity of the multicritical point is calculated by a practical finite size scaling approach. DOI:10.5506/APhysPolB.44.221
引用
收藏
页码：221 / 229
页数：9
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