Abstract
A method is proposed for creating mercury point-contacts for point-contact spectroscopy. In this method point-contacts are produced at low temperature between mercury-coated metal substrate electrodes. The coatings are produced by exposing the electrodes to mercury at room temperature. The nonlinear part of the normal-state resistance of the contacts is studied experimentally, after which the point-contact electron-phonon interaction function is reconstructed. The experimental results are in good agreement with existing data on the tunneling effect in superconductors. Specifically, good agreement obtains for the positions of the main peak of the electron-phonon interaction function, the maximum phonon frequency, and the numerical values of the average and rms phonon frequencies.
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