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Enhancement of Tunneling Density of States at a Junction of Three Luttinger Liquid Wires

Agarwal, Amit and Das, Sourin and Rao, Sumathi and Sen, Diptiman (2009) Enhancement of Tunneling Density of States at a Junction of Three Luttinger Liquid Wires. In: Physical Review Letters, 103 (2). 026401-1-026401-4.

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We study the tunneling density of states (TDOS) for a junction of three Tomonaga-Luttinger liquid wires. We show that there are fixed points which allow for the enhancement of the TDOS, which is unusual for Luttinger liquids. The distance from the junction over which this enhancement occurs is of the order of x=v/(2 omega), where v is the plasmon velocity and omega is the bias frequency. Beyond this distance, the TDOS crosses over to the standard bulk value independent of the fixed point describing the junction. This finite range of distances opens up the possibility of experimentally probing the enhancement in each wire individually.

Item Type: Journal Article
Publication: Physical Review Letters
Publisher: The American Physical Society
Additional Information: Copyright of this article belongs to The American Physical Society.
Department/Centre: Division of Physical & Mathematical Sciences > Centre for High Energy Physics
Date Deposited: 31 Jul 2009 03:31
Last Modified: 19 Sep 2010 05:39
URI: http://eprints.iisc.ac.in/id/eprint/21831

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