1ST-ORDER TRANSITION IN FRUSTRATED QUANTUM ANTIFERROMAGNETS

被引：84

作者：

CHUBUKOV, A ^{[1
]}

机构：

[1] INST PHYS PROBLEMS,MOSCOW 117334,USSR

来源：

PHYSICAL REVIEW B | 1991年 / 44卷 / 01期

关键词：

D O I：

10.1103/PhysRevB.44.392

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A two-dimensional frustrated quantum Heisenberg model with first-, second- (diagonal), and third-neighbor couplings (J1-J2-J3 Model) is studied near the phase boundary of the antiferromagnetic (pi,pi) phase. It is shown that quantum corrections remove accidental classical degeneracy and ensure a nonzero hysteresis width for the J3 = 0 transition between commensurate (pi,pi) and (pi,0) phases, so that finite J3 is necessary to produce a continuous transition through the intermediate disordered phase.

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页码：392 / 394

页数：3

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