REAL-SPACE RENORMALIZATION-GROUP ANALYSIS OF THE S=2 ANTIFERROMAGNETIC HEISENBERG CHAIN

被引：37

作者：

NISHIYAMA, Y

TOTSUKA, K

HATANO, N

SUZUKI, M

机构：

[1] Department of Physics, University of Tokyo, Tokyo 113, Hongo 7-3-1, Bunkyo-ku

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 1995年 / 64卷 / 02期

关键词：

QUANTUM SPIN SYSTEMS; HALDANE CONJECTURE; DENSITY-MATRIX RENORMALIZATION METHOD; S=2 SYSTEM; ANTIFERROMAGNETIC HEISENBERG CHAIN; VALENCE-BOND SOLID;

D O I：

10.1143/JPSJ.64.414

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The S=2 antiferromagnetic Heisenberg open chain is analyzed with the real-space numerical renormalization-group method improved by White. The low-lying spectrum and the one-point function are evaluated to show the degeneracy and the boundary effect on the ground state. Generalized string correlation functions were calculated for theta=pi and theta=pi/2. The theta=pi/2 string correlation is found to indicate the long-range hidden order of the ground state. These results are quite consistent with the S=2 VBS argument.

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页码：414 / 422

页数：9

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