Frustration-Induced Ferrimagnetism in S=1/2 Heisenberg Spin Chain

被引：18

作者：

Shimokawa, Tokuro ^{[1
]}

Nakano, Hiroki ^{[1
]}

机构：

[1] Univ Hyogo, Grad Sch Mat Sci, Kamigori, Hyogo 6781297, Japan

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 2011年 / 80卷 / 04期

关键词：

quantum spin chain; frustration; ferrimagnetism; DMRG; exact diagonalization; GROUND-STATE PROPERTIES; DIAMOND-CHAIN; NEAREST-NEIGHBOR; DELTA-CHAIN;

D O I：

10.1143/JPSJ.80.043703

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The ground-state properties of the S = 1/2 frustrated Heisenberg spin chain with interactions up to fourth nearest neighbors are investigated by the exact-diagonalization method and density matrix renormalization group method. Our numerical calculations clarify that the ferrimagnetic state is realized in the ground state in spite of the fact that a multi-sublattice structure in the shape of the system is absent. We find that there are two types of ferrimagnetic phases: one is the well-known ferrimagnetic phase of the Lieb-Mattis type and the other is the nontrivial ferrimagnetic phase that is different from that of the Lieb-Mattis type. Our results suggest that a multi-sublattice structure of the shape is not necessarily required for the occurrence of ferrimagnetism.

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页数：4

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