Large N behavior of Non-Ohmic Tunnel Junctions

Details Large N behavior of Non-Ohmic Tunnel Junctions Large N behavior of Non-Ohmic Tunnel Junctions

1997-08-25

arxiv.org/abs/cond-mat/9708194v1

Physics

Condensed Matter

4 pages LaTeX. 1 .eps figure

Scientific paper

Non-Ohmic tunnel junctions are believed to occur in systems where the exciton and orthogonality catastrophe effects significantly modify tunneling rates. Here we present a simple non-perturbative treatment of the thermodynamic and transport properties of subOhmic and superOhmic tunnel junctions. The large-N approximation demonstrates the existence of a quantum phase transition in subOhmic but not superOhmic tunnel junctions. In addition, we find a pseudogap which vanishes continuously as the transition is approached.

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