GROUND-STATE PROPERTIES OF A GENERALIZED VBS-MODEL

被引：196

作者：

KLUMPER, A

SCHADSCHNEIDER, A

ZITTARTZ, J

机构：

[1] Institut für Theoretische Physik, Universität zu Köln, Köln 41, W-5000

来源：

ZEITSCHRIFT FUR PHYSIK B-CONDENSED MATTER | 1992年 / 87卷 / 03期

关键词：

D O I：

10.1007/BF01309281

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We study a generalized "q-deformed" VBS-model. This is a spin-1 quantum antiferromagnet with nearest neighbour interaction on a linear chain. The exact groundstate is determined in the form of a matrix-product of individual site-contributions. All relevant groundstate properties are calculated. The groundstate is unique, it has a finite gap to the excitations, and correlations decay exponentially. Thus the model has all the properties described by Haldane to be generic for certain quantum antiferro-magnets with integral spin.

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页码：281 / 287

页数：7

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