Abstract
A microscopic model for a granular superconductor consisting of an array of small superconducting particles interacting via the Josephson coupling is considered. Allowing for the non-zero charging energy produces the electromagnetic scalar potential fluctuations that accompany charge transfers between grains. It is shown that these fluctuations give rise to the quasi-particle charged environment which, in turn, screens the Coulomb interaction between grains, even at zero temperature. The relevance of this screening mechanism which is not thermally activated to the so-called 're-entrant' behaviour in granular superconductors is pointed out.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
