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Tunneling density of states, pair correlation, and Josephson current in spin-incoherent Luttinger-liquid/superconductor hybrid systems

Tilahun, Dagim and Fiete, Gregory A. (2008) Tunneling density of states, pair correlation, and Josephson current in spin-incoherent Luttinger-liquid/superconductor hybrid systems. Physical Review B, 77 (14). Art. No. 140505(R). ISSN 1098-0121. https://resolver.caltech.edu/CaltechAUTHORS:TILprb08

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Abstract

We study a hybrid system consisting of a spin-incoherent Luttinger liquid adjoined at one or both ends to a superconductor. We find that the tunneling density of states diverges at low energies and exhibits a universal frequency dependence independent of the strength of the interactions in the system. We show that in spite of exponentially decaying pair correlations with distance into the spin-incoherent Luttinger liquid, the Josephson current remains robust. Compared to the zero temperature Luttinger-liquid case, there is a factor of 2 reduction in the critical current and a halving of the period in the phase difference between the superconductors. We hope these results motivate a class of experiments in the spin-incoherent regime of one-dimensional systems.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1103/PhysRevB.77.140505DOIUNSPECIFIED
Additional Information:©2008 The American Physical Society. (Received 24 March 2008; published 18 April 2008) We are grateful to Oleg Starykh for helpful discussions and for financial support from the NSF under Grants No. PHY05-51164, and No. DMR-0606489, the Lee A. DuBridge Foundation, and the Welch Foundation.
Subject Keywords:Cooper pairs; electronic density of states; Josephson effect; Luttinger liquid; superconducting materials; tunnelling
Issue or Number:14
Record Number:CaltechAUTHORS:TILprb08
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:TILprb08
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:10250
Collection:CaltechAUTHORS
Deposited By: Archive Administrator
Deposited On:18 Apr 2008
Last Modified:03 Oct 2019 00:07

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