A 2-IMPURITY MODEL FOR THE UNDERSCREENED KONDO PROBLEM

Authors
LEHUR K COQBLIN B
Citation
K. Lehur et B. Coqblin, A 2-IMPURITY MODEL FOR THE UNDERSCREENED KONDO PROBLEM, Physica. B, Condensed matter, 230, 1997, pp. 454-456
Citations number
20
Categorie Soggetti
Physics, Condensed Matter
Journal title
Physica. B, Condensed matter → ACNP
ISSN journal
09214526
Volume
230
Year of publication
1997
Pages
454 - 456
Database
ISI
SICI code
0921-4526(1997)230:<454:A2MFTU>2.0.ZU;2-6
Abstract
The underscreened Kondo effect is studied within a model of two impuri ties with S = 1 interacting with the conduction band and via a classic al interimpurity coupling KS1 . S-2. A completely asymmetric situation is obtained with one s = 1/2 component strongly screened by the Kondo effect and the other one almost free to yield direct or indirect magn etism, which shows finally a possible coexistence between a strong loc al Kondo effect and the RKKY interaction between the two S = 1 spins, for some values of the K parameter.