Subharmonic energy-gap structure in superconducting constrictions

Journal Article · Wed Jun 01 00:00:00 EDT 1983 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.27.6739· OSTI ID:6015699

Octavio, M; Tinkham, M; Blonder, G E; Klapwijk, T M

A Boltzmann-equation approach for the calculation of the I-V characteristics of superconducting constrictions is presented. This technique allows for the inclusion of normal scattering as well as Andreev reflection processes in the constriction. The computed I-V characteristics exhibit subharmonic gap structure which varies strongly with scattering strength and temperature. For even small scattering strengths, the structure is found to persist to T = 0, and its temperature dependence agrees qualitatively with experimental observations. In the limit of zero scattering, the technique is shown to be equivalent to the trajectory technique of Klapwijk, Blonder, and Tinkham.

• Research Organization: Fundacion Instituto de Ingeniera, Apartado 1827, Caracas, Venezuela
• OSTI ID: 6015699
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 27:11; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

656101* -- Solid State Physics-- Superconductivity-- General Theory-- (-1987)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BOLTZMANN EQUATION
DIFFERENTIAL EQUATIONS
ENERGY GAP
EQUATIONS
EQUIPMENT
FINE STRUCTURE
INTERFACES
OHM LAW
PARTIAL DIFFERENTIAL EQUATIONS
SCATTERING
SUPERCONDUCTORS
TUNNEL EFFECT