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Asymmetry in the LC resonance characteristic in dc superconducting quantum interference devices: New method of observing pair-quasiparticle interference in superconducting tunnel junctions

Journal Article · · Phys. Rev. B: Condens. Matter; (United States)

The LC (inductance-capacitance) resonance phenomenon in the dc SQUID (superconducting quantum interference device) creates a current peak in the I-V characteristics at a voltage determined by the resonance frequency. These I-V characteristics have been analyzed with the resistively shunted Josephson-junction model in the low-damping and small-oscillation regime. The resonance I-V characteristics contain sufficient information to determine all circuit parameters for the dc SQUID's. Specifically, we can apply this analysis to symmetric, tunnel-junction dc SQUID's to deduce the pair-quasiparticle interference conductance (costheta term).

Research Organization:
Electronics Research Laboratory, The Aerospace Corporation, P. O. Box 92957, Los Angeles, California 90009
OSTI ID:
6002301
Journal Information:
Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 24:5; ISSN PRBMD
Country of Publication:
United States
Language:
English