Green's function theory of the spin-1 low-dimensional quantum XY ferromagnet -: art. no. 134408

被引：9

作者：

Gouvêa, ME ^{[1
]}

Pires, AST ^{[1
]}

机构：

[1] Univ Fed Minas Gerais, ICEx, Dept Fis, BR-30123970 Belo Horizonte, MG, Brazil

来源：

PHYSICAL REVIEW B | 2001年 / 63卷 / 13期

关键词：

D O I：

10.1103/PhysRevB.63.134408

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We calculate the spin-spin correlations and the magnetic susceptibility of the quantum one- and two-dimensional XY models with S = 1, using the two-time Green's function method and performing a decoupling proposed by Kondo and Yamaji for cases with no long-range order. A set of self-consistent equations of the correlation functions are derived and solved numerically. We present results for the correlation functions, susceptibilities, and specific heat for the whole range of temperature.

引用

页数：6

共 34 条

[1] Thermodynamic properties of one-dimensional spin-1 antiferromagnetic Heisenberg chains: Green's-function approach [J].

Bao, SQ ;

Zhao, H ;

Shen, JL ;

Yang, GZ .

PHYSICAL REVIEW B, 1996, 53 (02) :735-740

[2]

Bogolyubov N.N., 1959, SOV PHYS DOKL, V4, P589

[3] LINEAR MAGNETIC CHAINS WITH ANISOTROPIC COUPLING [J].

BONNER, JC ;

FISHER, ME .

PHYSICAL REVIEW, 1964, 135 (3A) :A640-+

[4] Quantum Berezinskii-Kosterlitz-Thouless transition in square-lattice magnets with easy-plane anisotropy [J].

Capriotti, L ;

Cuccoli, A ;

Tognetti, V ;

Vaia, R ;

Verrucchi, P .

PHYSICA D, 1998, 119 (1-2) :68-72

[5] QUANTUM RENORMALIZATION OF THE XY MODEL [J].

CUCCOLI, A ;

TOGNETTI, V ;

VERRUCCHI, P ;

VAIA, R .

JOURNAL OF APPLIED PHYSICS, 1994, 75 (10) :5814-5816

[6] Spin-liquid state for two-dimensional Heisenberg antiferromagnets on a triangular lattice [J].

Dong, ZH ;

Feng, SP .

MODERN PHYSICS LETTERS B, 1998, 12 (17) :677-683

[7] Temperature dependence of the magnetic susceptibility of the spin 1/2 antiferromagnetic XXZ model on a square lattice [J].

Fukumoto, Y ;

Oguchi, A .

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 1996, 65 (01) :264-272

[8] VORTICES IN THE CLASSICAL TWO-DIMENSIONAL ANISOTROPIC HEISENBERG-MODEL [J].

GOUVEA, ME ;

WYSIN, GM ;

BISHOP, AR ;

MERTENS, FG .

PHYSICAL REVIEW B, 1989, 39 (16) :11840-11849

[9] Magnetic order-disorder transition in the two-dimensional spatially anisotropic Heisenberg model at zero temperature [J].

Ihle, D ;

Schindelin, C ;

Weisse, A ;

Fehske, H .

PHYSICAL REVIEW B, 1999, 60 (13) :9240-9243

[10] STATISTICAL MECHANICS OF ANISOTROPIC LINEAR HEISENBERG MODEL [J].

KATSURA, S .

PHYSICAL REVIEW, 1962, 127 (05) :1508-&

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