Phase diagram of the easy-plane ferromagnetic-antiferromagnetic S=1 Heisenberg chain

被引：0

作者：

Pan, Lihua ^{[1
]}

Cao, Yu ^{[1
]}

Xi, Bin ^{[1
]}

Liu, Yong-Jun ^{[1
]}

机构：

[1] Yangzhou Univ, Sch Phys Sci & Technol, Yangzhou 225002, Jiangsu, Peoples R China

来源：

PHYSICA B-CONDENSED MATTER | 2017年 / 523卷

关键词：

Quantized spin models; Chirality order; Incommensurability; Numerical simulation studies; Density-matrix renormalization group; MATRIX RENORMALIZATION-GROUP; HALDANE-GAP; MAGNETIC-PROPERTIES; SPIN CORRELATIONS; GROUND-STATE; QUANTUM; EXCITATIONS; DIMERIZATION; DYNAMICS;

D O I：

10.1016/j.physb.2017.07.045

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We perform a systematic investigation on the ground state of the easy-plane S=1 spin model with ferromagnetic nearest-neighbor and antiferromagnetic next-nearest-neighbor interactions using the Density Matrix Renormalization Group (DMRG) method. By analyzing the chirality order parameter, the spin correlation function and the spin structure factor, we determine the phase diagram. A chiral phase is identified in an intermediate frustration region even when the anisotropic value. is small. In addition, the spin-fluid phase with power-law decaying correlation exists for the anisotropic case when the frustration strength a is small. When a is large, the ground state is of the short-range-ordered incommensurate phase.

引用

页码：125 / 131

页数：7

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