A two-channel Kondo impurity in the spin-1/2 chain: consequences for Knight shift experiments

Citation
S. Eggert et S. Rommer, A two-channel Kondo impurity in the spin-1/2 chain: consequences for Knight shift experiments, PHYSICA B, 261, 1999, pp. 200-201
Citations number
10
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICA B
ISSN journal
0921-4526 → ACNP
Volume
261
Year of publication
1999
Pages
200 - 201
Database
ISI
SICI code
0921-4526(199901)261:<200:ATKIIT>2.0.ZU;2-C
Abstract
A magnetic impurity in the spin-1/2 chain is a simple realization of the tw o-channel Kondo problem since the field theoretical descriptions in the spi n sector are identical. The correlation functions near the impurity can be calculated. Using a modified version of the numerical transfer matrix DMRG, we are now able to accurately determine local properties close to the impu rity in the thermodynamic limit. The local susceptibilities (Knight-shifts) show an interesting behavior in a large range around the impurities. We ar e able to make quantitative experimental predictions which would allow one to observe two-channel Kondo physics for the first time directly by doping of spin-1/2 chain compounds. (C) 1999 Elsevier Science B.V. All rights rese rved.