Phys. Rev. Lett. 77, 3200–3203 (1996)Anomalous Density of States of a Luttinger Liquid in Contact with a SuperconductorReceived 30 April 1996; published in the issue dated 7 October 1996 We study the frequency and space dependence of the local tunneling density of states (DOS) of a Luttinger liquid (LL) connected to a superconductor. This coupling strongly modifies the single-particle properties of the LL. It significantly enhances the DOS near the Fermi level, whereas this quantity vanishes as a power law for an isolated LL. The enhancement is due to the interplay between electron-electron interactions and multiple backscattering processes of low-energy electrons at the interface between the LL and the superconductor. This anomalous behavior extends over large distances from the interface and may be detected by coupling normal probes to the system. © 1996 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.77.3200
DOI:
10.1103/PhysRevLett.77.3200
PACS:
74.50.+r, 72.15.Nj
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