Issue |
Europhys. Lett.
Volume 41, Number 2, January II 1998
|
|
---|---|---|
Page(s) | 213 - 218 | |
Section | Condensed matter: electronic structure, electrical, magnetic and optical properties | |
DOI | https://doi.org/10.1209/epl/i1998-00567-2 | |
Published online | 01 September 2002 |
Multichannel Kondo screening in a one-dimensional correlated electron system
1
Institute of Theoretical Physics,
Chalmers University of Technology and Göteborg University, S-412 96
Göteborg, Sweden
2
B. I. Verkin Institute for Low Temperature Physics and Engineering,
National Academy of Sciences of Ukraine,
Kharkov 310164, Ukraine
Received:
8
October
1997
Accepted:
27
November
1997
We present the exact Bethe ansatz solution of a multichannel model
of one-dimensional correlated
electrons coupled antiferromagnetically to a magnetic impurity of
arbitrary spin S.
The solution reveals that
interactions in the bulk make the magnetic impurity
drive both spin and charge fluctuations, producing a mixed
valence at the impurity site, with an associated
effective spin
in
the presence of a magnetic field. The screening of the impurity
is controlled by the size of the impurity spin independently of the
number of
channels, in contrast to the multichannel Kondo effect for free
electrons.
PACS: 75.20.Hr – Local moment in compounds and alloys; Kondo effect, valence fluctuations, heavy fermions / 71.27.+a – Strongly correlated electron systems; heavy fermions
© EDP Sciences, 1998
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