New fixed point for Kondo spin coupled to a junction of Luttinger liquids

Chandra, Ravi V and Rao, Sumathi and Sen, Diptiman (2005) New fixed point for Kondo spin coupled to a junction of Luttinger liquids. [Preprint]

Preview

PDF New_fixed.pdf Download (334kB)

Abstract

We study a system of an impurity spin coupled to a junction of several Tomonaga-Luttinger liquids using a renormalization group scheme. By starting close to the decoupled S-matrix at the junction, we find a new stable fixed point at a finite ferromagnetic value of the Kondo coupling, for repulsive inter-electron interactions; this leads to the possibility of spin-flip scatterings even at the lowest temperatures. If the junction is governed by the Gri_ths S-matrix, we find that the Kondo coupling flows to the strong coupling fixed point (Furusaki-Nagaosa point) where all the wires are decoupled and the conductance vanishes at zero temperature.

Item Type:	Preprint
Publication:	Los Alamos National Laboratory, Preprint Archive, Condensed Matter
Department/Centre:	Division of Physical & Mathematical Sciences > Centre for High Energy Physics
Date Deposited:	18 Jan 2006
Last Modified:	19 Sep 2010 04:22
URI:	http://eprints.iisc.ac.in/id/eprint/4946

Actions (login required)

View Item