COMPETITION BETWEEN KONDO EFFECT AND RKKY INTERACTION - A MOLECULAR-MODEL

被引：14

作者：

ANDREANI, LC ^{[1
]}

FRAIZZOLI, S ^{[1
]}

BECK, H ^{[1
]}

机构：

[1] UNIV NEUCHATEL,INST PHYS,CH-2000 NEUCHATEL,SWITZERLAND

来源：

SOLID STATE COMMUNICATIONS | 1991年 / 77卷 / 09期

关键词：

D O I：

10.1016/0038-1098(91)90760-S

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The competition between Kondo effect and RKKY interaction is studied within an exactly solvable model, obtained from the two-impurity Anderson model by replacing the conduction band by two states. Results depend on the ratio between hopping t and Kondo temperature T(K): for t << T(K) two independent Kondo singlets are formed, while for t >> T(K) the impurity spins have strong antiferromagnetic correlations. Extrapolation to the full Anderson model suggests that an energy scale different from the RKKY coupling is responsible for the development of magnetic correlations between Kondo singlets.

引用

页码：635 / 640

页数：6

共 22 条

[1] KONDO EFFECT, ONE AND 2 KONDO IMPURITIES - IMPLICATIONS FOR THE LATTICE PROBLEM [J].

ABRAHAMS, E .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1987, 63-4 :234-238

[2] LOCALIZED MAGNETIC STATES IN METALS [J].

ANDERSON, PW .

PHYSICAL REVIEW, 1961, 124 (01) :41-&

[3] MAGNETIC-ORDERING AND ANOMALOUS GROUND-STATE IN CEAL2 [J].

BARBARA, B ;

ROSSIGNOL, MF ;

BOUCHERLE, JX ;

SCHWEIZER, J ;

BUEVOZ, JL .

JOURNAL OF APPLIED PHYSICS, 1979, 50 (03) :2300-2307

[4]

da Silva C. G., 1972, J PHYS C SOLID STATE, V5, P63

[5]

DOLG M, IN PRESS J CHEM PHYS

[6] FCC TYPE-III ANTIFERROMAGNETISM IN YBN [J].

DONNI, A ;

FISCHER, P ;

FURRER, A ;

BACSA, W ;

WACHTER, P .

ZEITSCHRIFT FUR PHYSIK B-CONDENSED MATTER, 1990, 80 (02) :269-274

[7]

FULDE P, 1988, SOLID STATE PHYS, V41, P1

[8] INTRODUCTION TO THE THEORY OF HEAVY FERMIONS [J].

FULDE, P .

JOURNAL OF PHYSICS F-METAL PHYSICS, 1988, 18 (04) :601-639

[9] KONDO EFFECT VERSUS INDIRECT EXCHANGE IN THE 2-IMPURITY ANDERSON MODEL - A MONTE-CARLO STUDY [J].

FYE, RM ;

HIRSCH, JE ;

SCALAPINO, DJ .

PHYSICAL REVIEW B, 1987, 35 (10) :4901-4908

[10] QUANTUM MONTE-CARLO STUDY OF THE 2-IMPURITY KONDO HAMILTONIAN [J].

FYE, RM ;

HIRSCH, JE .

PHYSICAL REVIEW B, 1989, 40 (07) :4780-4796

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