Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2007-06-25
Phys. Rev. B 77, 140505(R) (2008)
Physics
Condensed Matter
Strongly Correlated Electrons
5 pages, 2 figures, definition of the spin-incoherent luttinger regime clarified, references 3 and 10 updated
Scientific paper
10.1103/PhysRevB.77.140505
We study a hybrid system consisting of a spin-incoherent Luttinger liquid adjoined at one or both ends to a superconductor. We find 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. Our results open the way for a new class of experiments in the spin-incoherent regime of one dimensional systems.
Fiete Gregory A.
Tilahun Dagim
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