S. Brazovskii, P. Monceau and N. Kirova
J. Phys. IV France 131 (2005) 83-86
Theory of subgap interchain tunneling in quasi 1D conductorsS.I. Matveenko1 and S. Brazovskii2
1 L.D. Landau Institute for Theoretical Physics, Kosygina Str. 2, 119334 Moscow, Russia
2 LPTMS-CNRS, Bâtiment 100, Université, Paris-Sud, 91405 Orsay, France
We summarize a theory of internal coherent tunneling in the pseudogap region where the applied voltage is below the free electron gap. We address quasi 1D systems where the gap is originated by spontaneous lattice distortions (Peierls effect) like in CDWs or in polyacetylene, as well as generically gapful systems like conjugated polymers, semiconducting nanotubes and quantum wires of semiconductors. Their common property is a deep selftrapping of electrons and their pairs into solitons, polarons, bipolarons. The instanton approach allows to calculate the interchain tunneling current both in single electron (polarons) and bi-electron (bipolarons, solitons pairs) channels.
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