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Nonlinear fluctuation conductivity in N(S)N contacts

Nonlinear fluctuation conductivity in N(S)N contacts. K.S. Tikhonov , M.V. Feigel’man. Outline. Quantum corrections to conductivity. QC in non- Ohmic regime. Interaction corrections in the Coulomb channel: Non- Ohmic regime. Interaction corrections in the Cooper channel.

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Nonlinear fluctuation conductivity in N(S)N contacts

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  1. Nonlinear fluctuation conductivity in N(S)N contacts K.S. Tikhonov, M.V. Feigel’man

  2. Outline

  3. Quantum corrections to conductivity

  4. QC in non-Ohmic regime

  5. Interaction corrections in the Coulomb channel: Non-Ohmic regime

  6. Interaction corrections in the Cooper channel

  7. ‘Heating’ effect of electric field

  8. Weak (gaussian) fluctuations

  9. Fluctuation corrections: diagrammatic approach (linear response)

  10. Fluctuationcorrectionstoconductivity due to SC fluctuations: phenomenology

  11. Usadel equation

  12. Usadelequation: cont.

  13. Usadelequation: solution

  14. Kinetic equation: e-e interactions

  15. Electric current

  16. Bosonic action

  17. Bosonic action: high fields

  18. Fluctuation corrections

  19. Fluctuation corrections: results for T~Tc

  20. Nonlinear conductivity: T~Tc

  21. Conclusion/Outlook Thank you!

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