Extraction of the Eliashberg electron-phonon interaction function from tunneling data. The method and the program

TL;DR

This paper presents a mathematically rigorous method and a robust computer program for extracting the electron-phonon interaction function and superconducting energy gap from tunneling data, applicable to both low and high-temperature superconductors.

Contribution

It introduces a new mathematically correct method and a software tool for analyzing tunneling data to determine electron-phonon interactions in superconductors.

Findings

The method accurately extracts the electron-phonon interaction function.

The program is robust against experimental data imperfections.

Applicable to both low and high-temperature superconductors.

Abstract

Mathematical correct method for extraction of the complex superconducting energy gap parameter and electron- phonon interaction function from the tunnel density of states is presented. The computer program is shown to be robust against imperfections in experimental data and is widely used to investigate conventional (low Tc) as well as high- temperature superconductors.