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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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Official URL: http://dx.doi.org/10.1209/epl/i2006-10167-8

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
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.ernet.in/id/eprint/8608

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