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Behavior of Tl(2212)-Normal Metal Point Contacts under Microwave Irradiation

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Abstract

Current-voltage characteristics and their derivatives of S-c-N point contacts formed by Tl2Ba2CaCu2O8−x anvil - niobium needle have been studied in the temperature range from 4.2 to Tc under microwave irradiation of wide frequency range. At frequencies of order 1010 Hz two types of excess current (Iexc) dependence on irradiation power level P was observed. In one case at temperatures near T/Tc ≅ 0.5 an excess current oscillates with increasing of P as the square of zero order Bessel function. In another case closer to the critical temperature (mainly at T/Tc ≅ ≅ 0.9) the enhancement of Iexc by the microwave power was revealed. Observed effects demonstrate complicated dynamics of quasiparticles in Tl-based HTS.

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Authors and Affiliations

  1. B.Verkin Institute for Low Temperature Physics and Engineering, National Academy of Sciences of Ukraine, 47 Lenin Ave., Kharkov, 310164, Ukraine

    Alexei B. Agafonov, Vitaly M. Dmitriev & Andrey L. Solovjov

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  1. Alexei B. Agafonov
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  2. Vitaly M. Dmitriev
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  3. Andrey L. Solovjov
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Agafonov, A.B., Dmitriev, V.M. & Solovjov, A.L. Behavior of Tl(2212)-Normal Metal Point Contacts under Microwave Irradiation. Journal of Superconductivity 11, 9–10 (1998). https://doi.org/10.1023/A:1022696821425

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  • DOI: https://doi.org/10.1023/A:1022696821425

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