ONE-DIMENSIONAL HEISENBERG-ANTIFERROMAGNET WITH SPIN S = 3/2 - EXPERIMENTS ON AGCRP2S6

被引：21

作者：

MUTKA, H ^{[1
]}

PAYEN, C ^{[1
]}

MOLINIE, P ^{[1
]}

机构：

[1] INST MAT,F-44072 NANTES 03,FRANCE

来源：

EUROPHYSICS LETTERS | 1993年 / 21卷 / 05期

关键词：

HEISENBERG AND OTHER QUANTIZED LOCALIZED SPIN MODELS; STATIC PROPERTIES (INC ORDER PARAMETER; STATIC SUSCEPTIBILITY; HEAT CAPACITIES; CRITICAL EXPONENTS); DYNAMIC PROPERTIES;

D O I：

10.1209/0295-5075/21/5/020

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The magnetic susceptibility of the spin-(S = 3/2) Heisenberg chain AgCrP2S6 follows in a wide temperature range the recent quantum Monte Carlo result (Sandvik and Kurkijarvi, 1991) with a nearest-neighbour exchange (JS(i)S(i+1)) J/k(B) = 100 K. Inelastic neutron scattering in the quasi-one-dimensional phase indicates a spin-wave velocity C = 4.6J, well in excess of the classical value 3J. The results emphasize the strong quantum character of the S = 3/2 Heisenberg chain. The extrapolated zero-temperature susceptibility and the observed spin-wave velocity are compared with the theoretical predictions for half-integer spins and are compatible with universal critical properties for S = 1/2 and S = 3/2.

引用

页码：623 / 628

页数：6

共 29 条

[1] REALIZATION OF A WITTEN CRITICAL-THEORY IN (CH3)4NMNCL3 [J].