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Anomalous characteristics of Clarke blob-type junctions

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Abstract

A different type ofI–V characteristic has been observed in blob-type Josephson junctions made between a blob of tin and a niobium wire. In addition to the usual zero-voltage region, a low-differential-resistance region just above the zero-voltage critical current has been observed for the first time in this configuration. This region is found to behave like a voltage-dependent pair current and is explained in terms of the stimulation of supercurrents in the weak link, consistent with the Aslamazov-Larkin model.

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Gupta, A.K., Tomar, V.S. & Chauhan, M.P.S. Anomalous characteristics of Clarke blob-type junctions. J Low Temp Phys 50, 259–265 (1983). https://doi.org/10.1007/BF00681605

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Keywords

  • Niobium
  • Magnetic Material
  • Versus Characteristic
  • Critical Current
  • Weak Link