SPIN DYNAMICS OF A HEISENBERG S=1/2 ANTIFERROMAGNETIC CHAIN

被引：5

作者：

COWLEY, RA ^{[1
]}

TENNANT, DA ^{[1
]}

PERRING, TG ^{[1
]}

NAGLER, SE ^{[1
]}

TSVELIK, AM ^{[1
]}

机构：

[1] UNIV FLORIDA,DEPT PHYS,GAINESVILLE,FL 32611

来源：

PHYSICA A | 1993年 / 194卷 / 1-4期

关键词：

D O I：

10.1016/0378-4371(93)90360-G

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Neutron scattering techniques have been used to study the effect of quantum fluctuations on the excitation spectrum of the S = 1/2 Heisenberg antiferromagnetic chains in KCuF3. The experiments were performed using the MARI time-of-flight spectrometer on the ISIS pulsed source at the Rutherford Appleton Laboratory. The results show that at low temperatures there is a continuum of excitations well described by the ansatz of Muller et al. On heating the low energy part of the spectrum evolves as predicted by a continuum theory for the excitations, but more work is needed to develop a full temperature dependent theory.

引用

页码：280 / 287

页数：8

共 6 条

[1]

[Anonymous], 1962, PHYS REV, DOI DOI 10.1103/PHYSREV.128.2131

[2]

BONNER JC, 1974, AIP C P, V24

[3] QUANTUM SPIN DYNAMICS OF THE ANTI-FERROMAGNETIC LINEAR-CHAIN IN ZERO AND NONZERO MAGNETIC-FIELD [J].