Journal of Physical Studies 24(4), Article 4706 [5 pages] (2020)
DOI: https://doi.org/10.30970/jps.24.4706

RESONANT TUNNELING IN A DOUBLE-BARRIER JOSEPHSON JUNCTION

P. Shygorin1 , B. Venhryn2 

1Lesya Ukrainka Volyn National University, 13, Volya Ave., Lutsk, UA–43025, Ukraine,
2Lviv Polytechnic National University, 12, Bandera St., Lviv, UA–79013, Ukraine

Received 31 August 2020; in final form 18 November 2020; accepted 19 November 2020; published online 14 December 2020

The present paper presents an investigation of the current states in a double barrier tunnel Josephson junction. The Josephson supercurrent in tunnel multilayered structures has significant features related to the phenomenon of quantum resonant tunneling. The value of the supercurrent is very sensitive to the distance between the barriers (thickness of interior superconductor layer). This gives a possibility to fabricate the tunnel Josephson junctions with hight values of critical supercurrent. In this paper the relationship for the thickness of an interior superconductor layer has been found for which the double-barrier becomes fully transparent. We also investigated the current-phase relation for the double barrier tunnel Josephson junction, derived the equation for the critical value of a supercurrent and calculated the skewness in the current-phase relation for different values of the transparency of the junction.

Key words: Josephson junction, resonant tunneling, current–phase relation, skewness

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