SPIN EXCITATIONS IN A QUANTUM ANTIFERROMAGNET WITH MAGNETIC-IMPURITIES AND VACANCIES

被引：25

作者：

BRENIG, W

KAMPF, AP

机构：

[1] Department of Physics, University of California at Santa Barbara, Santa Barbara

来源：

PHYSICAL REVIEW B | 1991年 / 43卷 / 16期

关键词：

D O I：

10.1103/PhysRevB.43.12914

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The two-dimensional antiferromagnetic spin-1/2 Heisenberg model on a square lattice is considered in the presence of randomly distributed vacancies and magnetic impurities. We calculate the configurationally averaged spin excitations of the system in the limit of small impurity concentrations. We apply linear spin-wave theory to the host and use the exact T matrix for the impurity sites. Results for the spin-wave spectrum are presented. These include resonant scattering effects, the renormalized spin-wave dispersion, and the spin-wave damping.

引用

页码：12914 / 12920

页数：7

共 21 条

[11] MAGNETIC PAIR-BREAKING EFFECTS - MOMENT FORMATION AND CRITICAL DOPING LEVEL IN SUPERCONDUCTING LA1.85SR0.15CU1-XAXO4 SYSTEMS (A = FE, CO, NI, ZN, GA, AL) [J].

GANG, X ;

CIEPLAK, MZ ;

XIAO, JQ ;

CHIEN, CL .

PHYSICAL REVIEW B, 1990, 42 (13) :8752-8755

[12] Field dependence of the intrinsic domain magnetization of a ferromagnet [J].

Holstein, T ;

Primakoff, H .

PHYSICAL REVIEW, 1940, 58 (12) :1098-1113

[13] LOCALIZED SPIN WAVES IN FERROMAGNETS WITH AN ANTIFERROMAGNETIC IMPURITY [J].

ISHII, H ;

KANAMORI, J ;

NAKAMURA, T .

PROGRESS OF THEORETICAL PHYSICS, 1965, 33 (05) :795-&

[14] LATTICE GREENS FUNCTIONS FOR RECTANGULAR AND SQUARE LATTICES AT ARBITRARY POINTS [J].

KATSURA, S ;

INAWASHIRO, S .

JOURNAL OF MATHEMATICAL PHYSICS, 1971, 12 (08) :1622-+

[15] ISOLATED FERROMAGNETIC BONDS IN THE 2-DIMENSIONAL SPIN-1/2 HEISENBERG-ANTIFERROMAGNET [J].

LEE, KJB ;

SCHLOTTMANN, P .

PHYSICAL REVIEW B, 1990, 42 (07) :4426-4430

[16]

MARKERT JT, PHYSICAL PROPERTIES, P265

[17] USEFUL PROCEDURE FOR COMPUTING LATTICE GREENS FUNCTION - SQUARE, TETRAGONAL, AND BCC LATTICES [J].

MORITA, T .

JOURNAL OF MATHEMATICAL PHYSICS, 1971, 12 (08) :1744-&

[18] MONTE-CARLO SIMULATIONS OF THE SPIN-1/2 HEISENBERG-ANTIFERROMAGNET ON A SQUARE LATTICE [J].

REGER, JD ;

YOUNG, AP .

PHYSICAL REVIEW B, 1988, 37 (10) :5978-5981

[19]

Spanier J., 1987, ATLAS FUNCTIONS, P609

[20] ANTIFERROMAGNETICALLY COUPLED IMPURITIES IN A HEISENBERG FERROMAGNET [J].

WANG, YL ;

CALLEN, H .

PHYSICAL REVIEW, 1967, 160 (02) :358-&

← 1 2 3 →