Title
Nonequilibrium thermodynamics of Josephson devices
Author
Maassen van den Brink, A.
Dekker, H.
TNO Fysisch en Elektronisch Laboratorium
Publication year
1996
Abstract
The rapid increase of the Josephson free energy as the temperature of a tunneling junction drops below the superconducting transition temperature Tc is shown to make this transition of first order in a system in which the phase difference φ across the junction is constrained to have a nonzero value. Taking this effect into account, we introduce an availability potential governing the nonisothermal dynamics of the junction which, in contrast with previous results, has no artifacts like latent heat being released upon entering the - high temperature - normal state or a value in this state which depends on the - superconducting - phase difference. The thermodynamic analysis is preceded by a detailed calculation of the Josephson coupling in a model of two ideal BCS superconductors coupled by a tunneling Hamiltonian.
Subject
Physics
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http://resolver.tudelft.nl/uuid:1dd27d70-b36f-41a7-a018-9b05959ca2fd
TNO identifier
94940
Source
Modern Physics Letters B, 10 (19), 903-908
Document type
article