Phase-coherent conductance of a superconductor{endash}normal-metal quantum interferometer

Journal Article · Mon Apr 01 04:00:00 EST 1996 · Physical Review, B: Condensed Matter

DOI:https://doi.org/10.1103/PhysRevB.53.9267· OSTI ID:280190

Volkov, A F; Zaitsev, A V ^[1]

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1. Institute of Radio Engineering and Electronics, Russian Academy of Sciences, Mokhovaya Street 11, 103907 Moscow (Russia)

A theory of the subgap conductance of a hybrid superconductor{endash}normal-metal ({ital S}/{ital N}) quantum interferometer consisting of two tunnel junctions ({ital S}/{ital N}) in contact with an {ital N} layer is developed. The oscillatory dependence of the conductance of the system {ital G} on the phase difference between superconductors {var_phi} is shown to be due to the proximity effect, i.e., to the penetration of the condensate into the {ital N} region. The {ital G}({var_phi}) dependence is found for the cases of both weak and strong proximity effects. This dependence can radically change its shape form qualitatively when the voltage is varied. The amplitude of the conductance oscillations appears to be large in the case of strong proximity effect. Different layouts are considered including the cases when there is the third tunnel junction or point contact between the {ital N} conductor and the {ital N} electrode. {copyright} {ital 1996 The American Physical Society.}

• OSTI ID: 280190
• Journal Information: Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 14 Vol. 53; ISSN PRBMDO; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
ELECTRIC CONDUCTIVITY
INTERFEROMETERS
PHASE SHIFT
PROXIMITY EFFECT
SUPERCONDUCTING JUNCTIONS
TUNNEL EFFECT