Intermediate Haldane phase in spin-2 quantum chains with uniaxial anisotropy

被引：16

作者：

Tu, Hong-Hao ^{[1
]}

Orus, Roman ^{[1
]}

机构：

[1] Max Planck Inst Quantum Opt, D-85748 Garching, Germany

来源：

PHYSICAL REVIEW B | 2011年 / 84卷 / 14期

关键词：

HEISENBERG-ANTIFERROMAGNET; FIELD-THEORY; SYMMETRY; STATES; ORDER; GAP;

D O I：

10.1103/PhysRevB.84.140407

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We provide evidence of an intermediate Haldane phase in a spin-2 quantum chain. By combining effective field theory and numerical approaches, we show that the phase diagram of the proposed model includes SO( 5) Haldane, intermediate Haldane, and large-D phases. We determine the characteristic properties of these phases, including edge states, string order parameters, and degeneracies in the entanglement spectrum. The symmetries responsible for the degeneracy patterns observed in the entanglement spectrum are also discussed.

引用

页数：4

共 39 条

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