Phase-periodic proximity-effect compensation in symmetric normal/superconducting mesoscopic structures
| Popis souboru: | application/pdf |
|---|---|
| Jazyk: | English |
| ISSN: | 0163-1829 |
| Přístupová URL adresa: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b41fc526e1340cb0f386c9cafcab2f20 https://repository.royalholloway.ac.uk/items/6c188519-c898-c8e0-be65-ee0a699fba95/2/ |
| Rights: | OPEN |
| Přírůstkové číslo: | edsair.doi.dedup.....b41fc526e1340cb0f386c9cafcab2f20 |
| Autor: | I. A. Sosnin, V. T. Petrashov, R. Sh. Shaikhaidarov, Per Delsing, A. F. Volkov, Tord Claeson |
| Jazyk: | angličtina |
| Rok vydání: | 1998 |
| Předmět: |
Josephson effect
Superconductivity Physics Mesoscopic physics ELECTRON-ELECTRON SCATTERING Research Groups and Centres\Physics\Low Temperature Physics Condensed matter physics CONDUCTANCE Faculty of Science\Physics NORMAL-METAL Conductance QUASI-PARTICLE INTERFERENCE TRANSPORT Coherence length Pi Josephson junction SUPERCONDUCTORS Phase (matter) Condensed Matter::Superconductivity Proximity effect (superconductivity) |
| Zdroj: | Physical Review B, 58 (22) |
| ISSN: | 0163-1829 |
| Popis: | The conductance (G) of mirror-symmetric, disordered normal (N) metal mesoscopic structures with two interfaces to superconductors (S) has been studied experimentally with applied condensate phase differences Delta phi between the N/S interfaces. At Delta phi = 2n pi(n = 0,1,2,3,...) the conductance showed reentrance to the normal state below the temperature corresponding to the Thouless energy. The current-voltage characteristics were found to be: strongly nonlinear even at distances between the N/S interfaces largely exceeding the normal-metal coherence length. An influence of superconductors almost completely disappeared at Delta phi = (2n + 1) pi where the structures showed normal behavior. Calculations based on a quasiclassical theory have been performed offering a quantitative explanation of such a phase-periodic reentrance. The value of the superconducting gap Delta(eff) at the Ag/Al interface has been obtained. We find that Delta(eff)(T,V-->0) = beta .Delta(BCS)(T) with beta = 0.2 independent of temperature in the temperature interval of 0.1 K < T < 1.6 K; Delta(BCS)(T) is the BCS gap vs T function in Al. [S0163-1829(98)01746-9]. |
| Databáze: | OpenAIRE |
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