EXACT CALCULATION OF THE GROUND-STATE DYNAMICAL SPIN CORRELATION-FUNCTION OF A S=1/2 ANTIFERROMAGNETIC HEISENBERG CHAIN WITH FREE SPINONS

被引：94

作者：

HALDANE, FDM ^{[1
]}

ZIRNBAUER, MR ^{[1
]}

机构：

[1] UNIV COLOGNE,INST THEORET PHYS,D-50937 COLOGNE,GERMANY

来源：

PHYSICAL REVIEW LETTERS | 1993年 / 71卷 / 24期

关键词：

D O I：

10.1103/PhysRevLett.71.4055

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We calculate the exact dynamical magnetic structure factor S(Q, E) in the ground state of a one-dimensional S = 1/2 antiferromagnet with gapless free S = 1/2 spinon excitations, the Haldane-Shastry model with inverse-square exchange, which is in the same low-energy universality class as Bethe's nearest-neighbor exchange model. Only two-spinon excited states contribute, and S(Q, E) is found to be a very simple integral over these states.

引用

页码：4055 / 4058

页数：4

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