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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