Point-contact spectroscopy of magnesium diboride with different counter-electrodes

A. I. D'yachenko, V. Yu. Tarenkov, M. A. Belogolovskii +3

We report on tunneling and Andreev-reflection conductance spectra of 39 K superconducting magnesium diboride, obtained with Pb and Au counter-electrodes. Two distinct steps at clos…