Point contact spectroscopy of the high-temperature superconductor $La_{1.8}Sr_{0.2}CuO_{4}$

TL;DR

This study uses point contact spectroscopy to measure the energy gap and phonon energies in the high-temperature superconductor La1.8Sr0.2CuO4, analyzing their temperature dependence to understand its superconducting properties.

Contribution

First application of point contact spectroscopy to La1.8Sr0.2CuO4 for detailed energy gap and phonon energy measurements.

Findings

Energy gap measured across temperature range

Characteristic phonon energies identified

Temperature dependence of the energy gap established

Abstract

The energy gap has been measured and the characteristic phonon energies determined for the superconducting compound $La_{1.8}Sr_{02}CuO_4$ from the current-voltage characteristics of point contacts with a copper counterelectrode. The temperature dependence of the energy gap was determined. pacs 73.40.Jn, 74.25.Kc, 74.45.+c, 73.40.-c, 74.20.Mn, 74.70.Ad, 74.72.-h, Dn