J1-J2 MODEL - ENERGY, CORRELATIONS, AND ORDER-PARAMETER FLUCTUATIONS ON FINITE LATTICES

被引：28

作者：

CECCATTO, HA

GAZZA, CJ

TRUMPER, AE

机构：

[1] Instituto de Fisica Rosario, Universidad Nacional de Rosario Boulevard 27 de Febrero 210Bis

来源：

PHYSICAL REVIEW B | 1992年 / 45卷 / 14期

关键词：

D O I：

10.1103/PhysRevB.45.7832

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A modified spin-wave theory is applied to frustrated quantum antiferromagnets on finite square lattices. The results for the energy and for the correlation functions are found to agree very well with exact values obtained by numerical methods. The fluctuations of different order parameters, previously proposed to characterize possible different phases of purely quantum origin, are investigated. Our results suggest that the enhancement of long-range dimer and twist order seen numerically is not significant, and is due to the finite size of the lattices considered.

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页码：7832 / 7836

页数：5

相关论文

共 23 条

[1] THE RESONATING VALENCE BOND STATE IN LA2CUO4 AND SUPERCONDUCTIVITY [J].

ANDERSON, PW .

SCIENCE, 1987, 235 (4793) :1196-1198

[2] LOW-TEMPERATURE BEHAVIOR OF TWO-DIMENSIONAL QUANTUM ANTIFERROMAGNETS [J].

CHAKRAVARTY, S ;

HALPERIN, BI ;

NELSON, DR .

PHYSICAL REVIEW LETTERS, 1988, 60 (11) :1057-1060

[3] TWO-DIMENSIONAL QUANTUM HEISENBERG-ANTIFERROMAGNET AT LOW-TEMPERATURES [J].

CHAKRAVARTY, S ;

HALPERIN, BI ;

NELSON, DR .

PHYSICAL REVIEW B, 1989, 39 (04) :2344-2371

[4] ISING TRANSITION IN FRUSTRATED HEISENBERG MODELS [J].

CHANDRA, P ;

COLEMAN, P ;

LARKIN, AI .

PHYSICAL REVIEW LETTERS, 1990, 64 (01) :88-91

[5] POSSIBLE SPIN-LIQUID STATE AT LARGE S FOR THE FRUSTRATED SQUARE HEISENBERG LATTICE [J].

CHANDRA, P ;

DOUCOT, B .

PHYSICAL REVIEW B, 1988, 38 (13) :9335-9338

[6] A QUANTUM FLUIDS APPROACH TO FRUSTRATED HEISENBERG MODELS [J].

CHANDRA, P ;

COLEMAN, P ;

LARKIN, AI .

JOURNAL OF PHYSICS-CONDENSED MATTER, 1990, 2 (39) :7933-7972

[7] PHASE-DIAGRAM OF THE FRUSTRATED SPIN-1/2 HEISENBERG-ANTIFERROMAGNET IN 2 DIMENSIONS [J].

DAGOTTO, E ;

MOREO, A .

PHYSICAL REVIEW LETTERS, 1989, 63 (19) :2148-2151

[8] THERMODYNAMIC BEHAVIOR OF AN IDEAL FERROMAGNET [J].

DYSON, FJ .

PHYSICAL REVIEW, 1956, 102 (05) :1230-1244

[9] GENERAL THEORY OF SPIN-WAVE INTERACTIONS [J].

DYSON, FJ .

PHYSICAL REVIEW, 1956, 102 (05) :1217-1230

[10] ORDERING DUE TO DISORDER IN A FRUSTRATED VECTOR ANTIFERROMAGNET [J].

HENLEY, CL .

PHYSICAL REVIEW LETTERS, 1989, 62 (17) :2056-2059