Large N behavior of Non-Ohmic Tunnel Junctions

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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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Condensed Matter

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http://salesiana.dossiersoluciones.com/handle/123456789/27780

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/9708194
 http://arxiv.org/abs/cond-mat/9708194

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arXiv