IMPURITIES IN S=1/2 HEISENBERG ANTIFERROMAGNETIC CHAINS - CONSEQUENCES FOR NEUTRON-SCATTERING AND KNIGHT-SHIFT

被引：152

作者：

EGGERT, S

AFFLECK, I

机构：

[1] GOTHENBURG UNIV, S-41296 GOTHENBURG, SWEDEN

[2] UNIV BRITISH COLUMBIA, DEPT PHYS, VANCOUVER, BC V6T 1Z1, CANADA

[3] UNIV BRITISH COLUMBIA, CANADIAN INST ADV RES, VANCOUVER, BC V6T 1Z1, CANADA

来源：

PHYSICAL REVIEW LETTERS | 1995年 / 75卷 / 05期

关键词：

D O I：

10.1103/PhysRevLett.75.934

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Nonmagnetic impurities in an S = 1/2 Heisenberg antiferromagnetic chain are studied using boundary conformal field theory techniques and finite-temperature quantum Monte Carlo simulations. We calculate the static structure function, S-imp(k), measured in neutron scattering and the local susceptibility, chi(i) measured in Knight shift experiments. S-imp(k) becomes quite large near the antiferromagnetic wave vector, and exhibits much stronger temperature dependence than the bulk structure function. chi(i) has a large component which alternates and increases as a function of distance from the impurity.

引用

页码：934 / 937

页数：4

共 10 条

[1]

Abramowitz M., 1964, HDB MATH FUNCTIONS

[2]

AFFLECK I, 1990, LES HOUCH S, V49, P563

[3]

Affleck I, 1994, SPRINGER SERIES SOLI, V118, P82

[4] CRITICAL-BEHAVIOR OF SPIN-S HEISENBERG ANTIFERROMAGNETIC CHAINS - ANALYTIC AND NUMERICAL RESULTS [J].