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Staircase Structure of Shapiro Steps

  • Condensed Matter
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Abstract

We investigate IV-characteristics of coupled Josephson junctions which model the intrinsic Josephson junctions in high temperature superconductors under external electromagnetic radiation. A staircase structure of Shapiro steps is found in the branching region. Its origin is related to the coupling between junctions and their switching from rotating to oscillating states. This conclusion is tested by detailed analysis of the IV-characteristics as for total stack and for each junction in the stack. IV-curves of junctions in the stack are compared with the average of time derivative of phase difference. Experimental observation of this staircase structure would give us a proof of coupling between junctions and a way for precise measurement of its value. Such investigations would be also useful for a diagnostic of Josephson junctions in the stack.

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Authors and Affiliations

  1. Bogoliubov Laboratory of Theoretical Physics, Joint Institute for Nuclear Research, Dubna, Moscow region, 141980, Russia

    Yu. M. Shukrinov, I. R. Rahmonov & M. Nashaat

  2. Dubna International University for Nature, Society and Man, Dubna, Moscow region, 141982, Russia

    Yu. M. Shukrinov

  3. Umarov Physical and Technical Institute, 734063, Dushanbe, Tajikistan

    I. R. Rahmonov

  4. Department of Physics, Cairo University, 12613, Cairo, Egypt

    M. Nashaat

Authors
  1. Yu. M. Shukrinov
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  2. I. R. Rahmonov
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  3. M. Nashaat
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Correspondence to Yu. M. Shukrinov.

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The article is published in the original. See the supplemental material for this paper at www.jetpletters.ac.ru.

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Shukrinov, Y.M., Rahmonov, I.R. & Nashaat, M. Staircase Structure of Shapiro Steps. Jetp Lett. 102, 803–806 (2015). https://doi.org/10.1134/S002136401524011X

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  • DOI: https://doi.org/10.1134/S002136401524011X

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