Generation of Terahertz oscillations by thin superconducting film in fluctuation regime

Todor Mishonov 1 Albert Varonov 1 Ioulia Chikina 2 Andrey Varlamov 3
1 St. Clement of Ohrid University at Sofia
2 LIONS - Laboratoire Interdisciplinaire sur l'Organisation Nanométrique et Supramoléculaire
NIMBE UMR 3685 - Nanosciences et Innovation pour les Matériaux, la Biomédecine et l'Energie (ex SIS2M)
3 SPIN-CNR [Rome]
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.
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https://hal-cea.archives-ouvertes.fr/cea-02191330
Contributor : Serge Palacin <>
Submitted on : Tuesday, July 23, 2019 - 2:23:09 PM
Last modification on : Thursday, July 25, 2019 - 1:15:50 AM

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Todor Mishonov, Albert Varonov, Ioulia Chikina, Andrey Varlamov. Generation of Terahertz oscillations by thin superconducting film in fluctuation regime. European Physical Journal B: Condensed Matter and Complex Systems, Springer-Verlag, 2019, 92 (7), pp.158. ⟨10.1140/epjb/e2019-100050-1⟩. ⟨cea-02191330⟩

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