Reconstruction of the Electron-Phonon Interaction Function for Superconductors Using Inhomogeneous Point-Contacts and Background Correction in Yanson Spectra

TL;DR

This paper presents a method to reconstruct the electron-phonon interaction function in superconductors using inhomogeneous niobium point-contacts, addressing background correction in Yanson spectra.

Contribution

It introduces a new model for background correction in Yanson spectra and applies inhomogeneous point-contacts to improve electron-phonon interaction analysis.

Findings

Successful reconstruction of the electron-phonon interaction function.

Development of a background correction method for Yanson spectra.

Enhanced understanding of inelastic processes in superconducting point-contacts.

Abstract

The application of inhomogeneous niobium point-contacts in the superconducting stata for reconstructing the electron-phonon interaction function is considered. The method is based on the use of the nonlinearity of current-voltage curve, which is due to the inelastic processes of suppressing excess point contact current when nonequilibrium phonons are scattered from the electrons undergoing Andreev reflection. A new model of background occurrence in point-contact Yanson spectra and some ways to correct this background are proposed.