Generation of Terahertz oscillations by thin superconducting film in fluctuation regime

Todor M. Mishonov (), Albert M. Varonov, Ioulia Chikina and Andrey A. Varlamov
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Todor M. Mishonov: Faculty of Physics, St. Clement of Ohrid University at Sofia
Albert M. Varonov: Faculty of Physics, St. Clement of Ohrid University at Sofia
Ioulia Chikina: LIONS, NIMBE, CEA, CNRS, Université Paris-Saclay, CEA Saclay
Andrey A. Varlamov: CNR-SPIN

The European Physical Journal B: Condensed Matter and Complex Systems, 2019, vol. 92, issue 7, 1-5

Abstract: Abstract Explicit analytical expressions for conductivity of a superconducting film above and below critical temperature in an arbitrary electric field are derived in the frameworks of the time dependent Ginzburg-Landau theory. It is confirmed that slightly below critical temperature the differential conductivity of superconducting film can become negative for small enough values of electric field. This fact may cause generation of electromagnetic oscillations if the superconducting film is appropriately coupled of with a resonator. Their maximal frequency is proportional to the value of critical temperature of superconducting transition. The obtained results can stimulate the development of Terahertz generators on the basis of high temperature superconducting films. Graphical abstract

Keywords: Solid; State; and; Materials (search for similar items in EconPapers)
Date: 2019
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DOI: 10.1140/epjb/e2019-100050-1

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