COMPLETE SOLUTION OF THE XXZ-MODEL ON FINITE RINGS - THERMODYNAMICAL PROPERTIES

被引：5

作者：

FABRICIUS, K

LOW, U

MUTTER, KH

机构：

[1] Physics Department, University of Wuppertal, Wuppertal

来源：

ZEITSCHRIFT FUR PHYSIK B-CONDENSED MATTER | 1993年 / 91卷 / 01期

关键词：

D O I：

10.1007/BF01316708

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The thermodynamical properties of the XXZ-model are studied by means of a complete diagonalization of the XXZ-Hamiltonian on rings with N = 4,6,.... 16 sites. Based on a finite size analysis we are able to extract the 'universal' term in the free energy as it is predicted by conformal invariance. We also study the finite site scaling properties of the density of states in a properly chosen scaling variable for the excitation energies. The thermal averages of the modulus of the momentum and of the reflection parity appear to be independent of the temperature in the thermodynamical limit.

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页码：51 / 56

页数：6

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