Modulation structure of a frustrated spin ladder

被引：7

作者：

Wang, YP ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Phys, Beijing 100080, Peoples R China

[2] Chinese Acad Sci, Ctr Condensed Matter Phys, Beijing 100080, Peoples R China

来源：

INTERNATIONAL JOURNAL OF MODERN PHYSICS B | 1999年 / 13卷 / 28期

基金：

中国国家自然科学基金;

关键词：

D O I：

10.1142/S0217979299003040

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We study a two-leg spin-1/2 ladder with isotropic exchanges and biquadratic interactions in the basic plaquettes. It is shown that for the extremely frustrated case, the system exhibits a self-organized phase separation. In some parameter regions, the singlet rungs form a Wigner-like lattice in the triplet-rung host. There are three types of elementary excitations in this modulation phase, i.e. the spinons in a triplet domain, the broken singlet rungs and the deformation of the Wigner-like lattice. The flux phase induced by an external magnetic field in the rung-dimerized phase is also discussed.

引用

页码：3323 / 3329

页数：7

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