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FLUCTUATIONAL CURRENT-VOLTAGE CHARACTERISTICS AND ACTIVATED FLOPS OF THE PHASE OF AN UNDERDAMPED JOSEPHSON JUNCTION.

[In Russian. / En russe.]

Author(s) : MEL'NIKOV V. I.

Type of article: Article

Summary

IN A JOSEPHSON JUNCTION DRIVEN BY A DIRECT CURRENT THE PHASE AND VOLTAGE FLUCTUATE IN COMPLETE ANALOGY TO FLUCTUATIONS OF THE COORDINATE AND VELOCITY OF A BROWNIAN PARTICLE IN A TILTED PERIODIC POTENTIAL. FOR THE UNDERDAMPED JUNCTION WITH THE POTENTIAL ENERGY SCALE LARGE COMPARED TO TEMPERATURE, THE STATIONARY FOKKER-PLANCK EQUATION IS REDUCED TO A SYSTEM OF 2 INTEGRAL EQUATIONS IN ENERGY VARIABLE. AT A CERTAIN MAGNITUDE OF THE DRIVING CURRENT THE LOSS OF THE JUNCTION ENERGY DUE TO DAMPING (OHMIC LOSS) IS EXACTLY COMPENSATED BY THE GAIN OF THE ENERGY DUE TO THE TILT OF THE POTENTIAL. AT THIS POINT THE CURRENT-VOLTAGE CHARACTERISTICS EXHIBITS A NEGATIVE JUMP IN THE LOGARITHMIC DERIVATIVE. THE MAXIMUM VALUE OF THE JUMP IS ATTAINED IN THE EXTREMELY UNDERDAMPED REGIME.

Details

  • Original title: [In Russian. / En russe.]
  • Record ID : 1985-2292
  • Languages: Russian
  • Source: Z. eksp. teor. Fiz. - vol. 88 - n. 4
  • Publication date: 1985/04
  • Document available for consultation in the library of the IIR headquarters only.

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