Magnetization plateau in the spin ladder with a four-spin exchange

被引：26

作者：

Sakai, T ^{[1
]}

Hasegawa, Y ^{[1
]}

机构：

[1] Himeji Inst Technol, Fac Sci, Ako, Hyogo 6781297, Japan

来源：

PHYSICAL REVIEW B | 1999年 / 60卷 / 01期

关键词：

D O I：

10.1103/PhysRevB.60.48

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The magnetization process of the S = 1/2 antiferromagnetic spin ladder with the four-spin cyclic exchange interaction at T = 0 is studied by the exact diagonalization of finite clusters and size scaling analyses. It is found that a magnetization plateau appears at half the saturation value if the ratio of the four- and two-spin exchange coupling constants J(4) is larger than the critical value J(4c) = 0.05 +/- 0.04. The phase transition with respect to J(4) at J(4c) is revealed to be the Kosterlitz-Thouless type. [S0163-1829(99)02226-2].

引用

页码：48 / 51

页数：4

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