ZERO-TEMPERATURE DYNAMICS OF THE S=1/2 LINEAR HEISENBERG ANTI-FERROMAGNET

被引：60

作者：

MULLER, G ^{[1
]}

BECK, H ^{[1
]}

BONNER, JC ^{[1
]}

机构：

[1] UNIV RHODE ISL,DEPT PHYS,KINGSTON,RI 02881

来源：

PHYSICAL REVIEW LETTERS | 1979年 / 43卷 / 01期

关键词：

D O I：

10.1103/PhysRevLett.43.75

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present an analytical expression for the dynamical spin-correlation function of the S=12 linear Heisenberg antiferromagnet based on the fact that the spectrum is dominated by a double continuum of spin-wave excitations. Our expression is not exact, but exact sum rules show that the degree of approximation is small. We predict that in a uniform magnetic field the spectral weight function will display a double-peaked structure. Such a feature is observed in recent neutron-scattering experiments. © 1979 The American Physical Society.

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页码：75 / 78

页数：4

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