Dephasing effects in superconducting heterojunctions: a crossover from coherent to sequential transmission

We present first experimental and theoretical results demonstrating a crossover from mesoscopic (phase-coherent transmission) to macroscopic (two resistors in series) behavior of conductance spectra for a normal-superconducting heterostructure. Following the lines of the Büttiker's approach to...

Full description

Saved in:
Bibliographic Details
Published in:Physica. C, Superconductivity Superconductivity, 2002-02, Vol.367 (1), p.218-221
Main Authors: Belogolovskii, M., Revenko, Yu, Svistunov, V., Grajcar, M., Seidel, P.
Format: Article
Language:English
Subjects:
Double-barrier junctions
High-temperature superconducting cuprates
Inelastic scattering, dephasing
Point-contact conductance spectra
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We present first experimental and theoretical results demonstrating a crossover from mesoscopic (phase-coherent transmission) to macroscopic (two resistors in series) behavior of conductance spectra for a normal-superconducting heterostructure. Following the lines of the Büttiker's approach to normal double-barrier devices, we show that phase-randomizing events in a mesoscopic interbarrier layer together with Andreev-reflection processes drastically influence corresponding conductance vs. voltage characteristics. An anomalous temperature shift of a gap-like feature in an Ag/LaBa 2Cu 3O 7− x point contact is interpreted as an effect of the partial phase decoherence in the intermediate magnetically active region between the normal-metal tip and the bulk 123-type superconducting cuprate.
ISSN:0921-4534
1873-2143
DOI:10.1016/S0921-4534(01)01018-8