DYNAMICAL PROPERTIES OF ANTIFERROMAGNETIC HEISENBERG SPIN CHAINS

被引：32

作者：

HAAS, S ^{[1
]}

RIERA, J ^{[1
]}

DAGOTTO, E ^{[1
]}

机构：

[1] FLORIDA STATE UNIV, SUPERCOMP COMP RES INST, TALLAHASSEE, FL 32306 USA

来源：

PHYSICAL REVIEW B | 1993年 / 48卷 / 05期

关键词：

D O I：

10.1103/PhysRevB.48.3281

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The dynamical properties of spin-1 and spin-1/2 antiferromagnetic Heisenberg chains (AHC's) are studied by diagonalizing exactly clusters of up to 18 and 26 sites, respectively. It is shown that the spin-1 AHC has a quasi-single-mode spectrum for momentum k greater-than-or-equal-to 0.3 pi, while the low-energy edge of the spin-1/2 AHC is dominated by a spin-wave continuum. The dispersion curve obtained for the spin-1 chain is in excellent agreement with recent experiments on Ni(C2H8N2)2NO2ClO4. The size dependence of the low-energy spectral weights is also analyzed.

引用

页码：3281 / 3286

页数：6

共 29 条

[1] CRITICAL-BEHAVIOR OF ANISOTROPIC SPIN-S HEISENBERG-CHAINS [J].

ALCARAZ, FC ;

MOREO, A .

PHYSICAL REVIEW B, 1992, 46 (05) :2896-2907

[2]

[Anonymous], 1962, PHYS REV, DOI DOI 10.1103/PHYSREV.128.2131

[3] Metal theory [J].

Bethe, H. .

ZEITSCHRIFT FUR PHYSIK, 1931, 71 (3-4) :205-226

[4] GROUND-STATE OF THE ONE-DIMENSIONAL ANTIFERROMAGNETIC HEISENBERG-MODEL [J].

BORYSOWICZ, J ;

KAPLAN, TA ;

HORSCH, P .

PHYSICAL REVIEW B, 1985, 31 (03) :1590-1599

[5] EXPERIMENTAL-EVIDENCE FOR THE HALDANE GAP IN A SPIN-1, NEARLY ISOTROPIC, ANTIFERROMAGNETIC CHAIN [J].

BUYERS, WJL ;

MORRA, RM ;

ARMSTRONG, RL ;

HOGAN, MJ ;

GERLACH, P ;

HIRAKAWA, K .

PHYSICAL REVIEW LETTERS, 1986, 56 (04) :371-374

[6]

COWLEY RE, UNPUB

[7] THE T-J AND FRUSTRATED HEISENBERG MODELS - A STATUS-REPORT ON NUMERICAL-STUDIES [J].

DAGOTTO, E .

INTERNATIONAL JOURNAL OF MODERN PHYSICS B, 1991, 5 (6-7) :907-935

[8] STRONGLY CORRELATED ELECTRONIC SYSTEMS WITH ONE HOLE - DYNAMIC PROPERTIES [J].

DAGOTTO, E ;

JOYNT, R ;

MOREO, A ;

BACCI, S ;

GAGLIANO, E .

PHYSICAL REVIEW B, 1990, 41 (13) :9049-9073

[9] S(Q,OMEGA) FOR THE S = 1/2 AND S = 1 ONE-DIMENSIONAL HEISENBERG-ANTIFERROMAGNET - A QUANTUM MONTE-CARLO STUDY [J].

DEISZ, J ;

JARRELL, M ;

COX, DL .

PHYSICAL REVIEW B, 1990, 42 (07) :4869-4872

[10] WHAT IS THE SPIN OF A SPIN-WAVE [J].

FADDEEV, LD ;

TAKHTAJAN, LA .

PHYSICS LETTERS A, 1981, 85 (6-7) :375-377

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