1 / 20

Instanton Theory for Subgap Internal Tunneling in Chain Conductors

This study proposes a theory for coherent tunneling in the pseudogap region of quasi-1D systems characterized by lattice distortions like CDWs and conjugated polymers. The theory explores the self-trapping of electrons into solitons, polarons, and bipolarons in gapful systems. Using instanton approach, the interchain tunneling current is calculated for single electron and bi-particle channels. The analysis includes transverse current, bi-electron tunneling, and bi-electronic tunneling results for commensurate CDW case. The research highlights high order thresholds and conclusions drawn from the study.

abram
Télécharger la présentation

Instanton Theory for Subgap Internal Tunneling in Chain Conductors

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Instanton theory of the subgap internal tunneling in chain conductors S. Matveenko and S. Brazovskii Landau Institute LPTMS,Orsay

  2. We suggest a theory of internal coherent tunneling in the pseudogap region where the applied voltage is below the free electron gap. We consider quasi 1D systems where the gap is originated by spontaneous lattice distortions (Peierls effect) like in CDWs or in polyacethylene, as well as generically gapful systems like conjugated polymers, semiconducting nanotubes and quantum wires of semiconductors. Their common property is a deep selftraping of electrons and possibly their pairs into solitons, polarons, bipolarons. The applied instanton approach allows to calculate the interchain tunneling current both in single electron (polarons, amplitude solitons) and bi-particle (bipolarons, phase solitons) channels.

  3. Calculation J(U):(1.commensurate CDW case)

  4. The transverse current:

  5. Bi-electron tunneling

  6. Bi-electronic tunnelingResults:

  7. ICDW Results

  8. Conclusions

  9. High order thresholds

More Related