Large N behavior of Non-Ohmic Tunnel Junctions

S.R. Renn

Large N behavior of Non-Ohmic Tunnel Junctions

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arxiv cond-mat/9708194 v1 pith:A3BVHUL6 submitted 1997-08-25 cond-mat

Large N behavior of Non-Ohmic Tunnel Junctions

S.R. Renn This is my paper

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keywords junctionstunnelnon-ohmicsubohmicsuperohmictransitionadditionapproached

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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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