Properties Of Highly Resistive Josephson Junctions

We have investigated indium break junctions and found a strongly reduced critical current as well as a residual resistance R-0 when the normal contact resistance R-N -> R-K/2 = h/2e(2). These results can be described by the horizon model,taking into account the small lead capacitance of the samples. The horizon of a Josephs onpoint contact equals the Compton wavelength of the quasi-particle oscillating in the washboard potential. Our samples had lead capacitances of order 1 - 10pF/m and very low losses with Q -> infinity.