NUMERICAL TEST OF FINITE-SIZE CORRECTIONS FOR THE ANISOTROPIC HEISENBERG-ANTIFERROMAGNET CHAIN

被引：3

作者：

MEDEIROS, D

CABRERA, GG

机构：

[1] Instituto de Física Gleb Wataghin, Universidade Estadual de Campinas (UNICAMP), Campinas 13.081, São Paulo

来源：

PHYSICAL REVIEW B | 1991年 / 44卷 / 02期

关键词：

D O I：

10.1103/PhysRevB.44.848

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A leading exponential dependence of the mass gap with size has been numerically tested in the whole axial-anisotropy region for the spin-1/2 XXZ antiferromagnetic chain. Exact results for finite chains are obtained via a modified Lanczos method due to Paige, allowing calculations up to N = 28 spins. Our results show that the ground state is doubly degenerate and displays long-range order throughout the whole anisotropic regime.

引用

页码：848 / 851

页数：4

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