Andreev spectroscopy of Josephson coupling

Journal Article · Thu Jun 01 00:00:00 EDT 1995 · Physical Review, B: Condensed Matter

DOI:https://doi.org/10.1103/PhysRevB.51.15312· OSTI ID:54935

Hekking, F W.J. ^[1]; Glazman, L I ^[1]; Schoen, G ^[2]

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1. Theoretical Physics Institute, University of Minnesota, Minneapolis, Minnesota 55455 (United States)
2. Institut fuer Theoretische Festkoerperphysik, Universitaet Karlsruhe, 76128 Karlsruhe (Germany)

It is shown that the low-energy spectrum of mesoscopic superconductors coupled by Josephson interaction can be probed by two-electron tunneling from a normal electrode. The Andreev reflection in the {ital NS} junction of a normal-superconductor-superconductor double junction ({ital NSS} transistor) provides a unique spectroscopic tool to probe the coherent Cooper-pair tunneling and the energy spectrum of the Josephson ({ital SS}) junction. The ground-state properties are reflected in a resonant structure of the linear conductance; excited states with an energy as low as the Josephson coupling energy lead to a threshold in the nonlinear {ital I}-{ital V} characteristic.

• OSTI ID: 54935
• Journal Information: Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 21 Vol. 51; ISSN 0163-1829; ISSN PRBMDO
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
COOPER PAIRS
ENERGY SPECTRA
GROUND STATES
JOSEPHSON EFFECT
REFLECTION
SUPERCONDUCTING JUNCTIONS
TUNNEL EFFECT