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Generation of Terahertz oscillations by thin superconducting film in fluctuation regime

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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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Authors and Affiliations

  1. Department of Theoretical Physics, Faculty of Physics, St. Clement of Ohrid University at Sofia, 5 James Bourchier Blvd., 1164, Sofia, Bulgaria

    Todor M. Mishonov & Albert M. Varonov

  2. LIONS, NIMBE, CEA, CNRS, Université Paris-Saclay, CEA Saclay, 91191, Gif sur Yvette Cedex, France

    Ioulia Chikina

  3. CNR-SPIN, Viale del Politecnico 1, 00133, Rome, Italy

    Andrey A. Varlamov

Authors
  1. Todor M. Mishonov
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  2. Albert M. Varonov
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  3. Ioulia Chikina
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  4. Andrey A. Varlamov
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Correspondence to Todor M. Mishonov.

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Mishonov, T.M., Varonov, A.M., Chikina, I. et al. Generation of Terahertz oscillations by thin superconducting film in fluctuation regime. Eur. Phys. J. B 92, 158 (2019). https://doi.org/10.1140/epjb/e2019-100050-1

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  • DOI: https://doi.org/10.1140/epjb/e2019-100050-1

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