THE DISAPPEARANCE OF 2-DIMENSIONAL LONG-RANGE ORDER IN THE HEISENBERG-MODEL WITH COMPETING INTERACTIONS

被引：17

作者：

BARABANOV, AF

MAKSIMOV, LA

STARYKH, OA

机构：

来源：

INTERNATIONAL JOURNAL OF MODERN PHYSICS B | 1990年 / 4卷 / 15-16期

关键词：

D O I：

10.1142/S021797929000108X

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

In the frustrated Heisenberg model with first (J1) and second (J2) nearest neighbours interactions on a square lattice the transition from the long range order state (LROS) to spin liquid state (SLS) is found at alpha = J1/J2-congruent-to-0.25. SLS is characterized by the gap in spin excitation spectrum at T = 0 and, hence, by exponential decay of spin correlation function at large distance. As a result, correlation length is temperature independent in SLS in accordance with neutron experiments on doped La2CuO4.

引用

页码：2319 / 2333

页数：15