STATIC AND DYNAMICAL SPIN SUSCEPTIBILITY IN 2D ANTIFERROMAGNETIC HEISENBERG-MODEL

被引：7
|
作者：
ALLEGA, AM [1 ]
ODASHIMA, S [1 ]
MATSUMOTO, H [1 ]
MANCINI, F [1 ]
机构：
[1] UNIV SALERNO,DIPARTIMENTO FIS TEOR & SMSA,I-84048 BARONISSI,ITALY
来源：
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 1994年 / 235卷
关键词：
D O I：
10.1016/0921-4534(94)92336-1
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Two-dimensional antiferromagnetic Heisenberg model is investigated by use of equations of motion and spin algebra within a mean field approximation. Development of a short range antiferromagnetic order is described by a nearest neighbor spin pair order parameter and spin excitation is expressed relatively to the nearest neighbor spins. With decreasing temperature, crossover behavior from Curie-Weiss behavior to spin liquid one is obtained as a result of increase of the spin-pair order parameter.
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页码：2229 / 2230
页数：2
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