A multi-channel fixed point for a Kondo spin coupled to a junction of Luttinger liquids

Chandra, Ravi V and Rao, S and Sen, D (2006) A multi-channel fixed point for a Kondo spin coupled to a junction of Luttinger liquids. In: Europhysics Letters, 75 (5). pp. 797-803.

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Abstract

We study a system of an impurity spin coupled to a junction of several Tomonaga-Luttinger liquids using a renormalization group scheme. For the decoupled S-matrix at the junction, there is a range of Kondo couplings which flow to a multi-channel fixed point for repulsive inter-electron interactions; this is associated with a characteristic temperature dependence of the spin-flip scatterings. If the junction is governed by the Griffiths S-matrix, the Kondo couplings flow to a strong-coupling fixed point where all the wires are decoupled.

Item Type:	Journal Article
Publication:	Europhysics Letters
Publisher:	EDP Science
Additional Information:	Copyright of this article belongs to EDP Science.
Department/Centre:	Division of Physical & Mathematical Sciences > Centre for High Energy Physics
Date Deposited:	26 Nov 2007
Last Modified:	01 Mar 2012 09:50
URI:	http://eprints.iisc.ac.in/id/eprint/8608

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