Ladders in a magnetic field: a strong coupling approach

被引：180

作者：

Mila, F ^{[1
]}

机构：

[1] Univ Toulouse 3, Phys Quant Lab, F-31062 Toulouse, France

来源：

EUROPEAN PHYSICAL JOURNAL B | 1998年 / 6卷 / 02期

关键词：

D O I：

10.1007/s100510050542

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We show that non-frustrated and frustrated ladders in a magnetic field can be systematically mapped onto an XXZ Heisenberg model in a longitudinal magnetic field in the limit where the rung coupling is the dominant one. This mapping is valid in the critical region where the magnetization goes from zero to saturation. It allows one to relate the properties of the critical phase (H-c(1), H-c(2), the critical exponents) to the exchange integrals and provide quantitative estimates of the frustration needed to create a plateau at half the saturation value for different models of frustration.

引用

页码：201 / 205

页数：5

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