QUANTUM ANTIFERROMAGNETISM IN 2 DIMENSIONS

被引：9
|
作者：
CAPELLMANN, H [1 ]
LOTFERING, J [1 ]
SCHARPF, O [1 ]
机构：
[1] INST MAX VON LAUE PAUL LANGEVIN, F-38042 GRENOBLE, FRANCE
来源：
ZEITSCHRIFT FUR PHYSIK B-CONDENSED MATTER | 1992年 / 88卷 / 02期
关键词：
D O I：
10.1007/BF01323570
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
We study the spin dynamics of the 2-dimensional spin 1/2 Heisenberg model at finite temperature T, in particular the frequency region omega < T much less than J (the coupling constant). The main conclusion reached is that the spin fluctuations have relaxational character, no propagating spin waves exist for omega < T. Comparison with experimental results on La2CuO4 give good agreement. Similarities and differences to previous theoretical treatments are discussed.
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页码：181 / 187
页数：7
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