Supercurrent decay in extremely underdamped Josephson junctions

Journal Article · Thu Jan 01 04:00:00 EST 1998 · Physical Review, B: Condensed Matter

DOI:https://doi.org/10.1103/PhysRevB.57.134· OSTI ID:573787

Ruggiero, B ^[1]; Granata, C ^[1]; Palmieri, V G; Esposito, A ^[1]; Russo, M; Silvestrini, P ^[1]

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1. Istituto di Cibernetica del CNR, I-80072 Arco Felice (Italy)

We present an experimental study of the effective dissipation relevant in the thermally activated supercurrent decay of extremely underdamped Josephson junctions. Data referring to the supercurrent decay of Nb/AlO{sub x}/Nb Josephson junctions are compared with the Kramers theory. Our measurements allow us to obtain the {open_quotes}effective{close_quotes} resistance to be used in the resistively shunted junction model that results to be the subgap resistance due to the presence of thermally activated quasiparticles. The extremely low dissipation level obtained at low temperatures renders our result quite interesting in view of experiments in the quantum limit. {copyright} {ital 1998} {ital The American Physical Society}

• OSTI ID: 573787
• Journal Information: Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 1 Vol. 57; ISSN PRBMDO; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
66 PHYSICS
ALUMINIUM OXIDES
ELECTRIC CONDUCTIVITY
ELECTRIC CURRENTS
ENERGY GAP
JOSEPHSON EFFECT
JOSEPHSON JUNCTIONS
NIOBIUM
QUASI PARTICLES
SUPERCONDUCTING JUNCTIONS
TYPE-II SUPERCONDUCTORS