Mean-field theory of the spin-Peierls state under magnetic field: Application to CuGeO3

被引：20

作者：

Azzouz, M ^{[1
]}

Bourbonnais, C ^{[1
]}

机构：

[1] UNIV SHERBROOKE,DEPT PHYS,SHERBROOKE,PQ J1K 2R1,CANADA

来源：

PHYSICAL REVIEW B | 1996年 / 53卷 / 09期

关键词：

D O I：

10.1103/PhysRevB.53.5090

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A mean-field theory of the spin-Peierls ordered state in a magnetic field is proposed for the two-dimensional Heisenberg model coupled to phonons, We show that fermionic excitations dominate the thermodynamics of this kind of system leading to a robust spin-Peierls order parameter or energy gap over a wide range of magnetic field in the low-temperature limit. This picture is shown to be consistent with recent observations made in the CuGeO3 material.

引用

页码：5090 / 5093

页数：4

共 19 条

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