Ordered phases of the anisotropic kagome-lattice antiferromagnet in a magnetic field

被引：14

作者：

Stoudenmire, E. A. ^{[1
]}

Balents, Leon ^{[1
]}

机构：

[1] Univ Calif Santa Barbara, Dept Phys, Santa Barbara, CA 93106 USA

来源：

PHYSICAL REVIEW B | 2008年 / 77卷 / 17期

关键词：

D O I：

10.1103/PhysRevB.77.174414

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The antiferromagnetic Heisenberg model on an anisotropic kagome lattice may be a good minimal model for real magnetic systems as well as a limit from which the isotropic case can be better understood. We therefore study the nearest-neighbor Heisenberg antiferromagnet on an anisotropic kagome lattice in a magnetic field. Such a system should be well described by weakly interacting spin chains, and we motivate a general form for the interaction by symmetry considerations and by perturbatively projecting out the interchain spins. In the spin-1/2 case, we find that the system exhibits a quantum phase transition from a ferrimagnetic ordered state to an XY ordered state as the field is increased. Finally, we discuss the appearance of magnetization plateaux in the ferrimagnetic phase.

引用

页数：10

共 27 条

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