Nodeless superconductivity in the infinite-layer electron-doped Sr_0.9La_0.1CuO_2 cuprate superconductor

TL;DR

This study investigates the superconducting properties of Sr_0.9La_0.1CuO_2, revealing evidence for nodeless s-wave pairing symmetry through muon-spin rotation measurements, aligning with other experimental findings.

Contribution

It provides direct experimental evidence for nodeless s-wave superconductivity in an infinite-layer electron-doped cuprate, challenging the conventional d-wave paradigm.

Findings

Temperature dependence of b consistent with s-wave symmetry

Magnetic field dependence supports nodeless superconductivity

Results align with tunneling, specific heat, and neutron scattering data

Abstract

We report on measurements of the in-plane magnetic penetration depth \lambda_{ab} in the infinite-layer electron-doped high-temperature cuprate superconductor Sr_0.9La_0.1CuO_2 by means of muon-spin rotation. The observed temperature and magnetic field dependences of \lambda_{ab} are consistent with the presence of a substantial s-wave component in the superconducting order parameter in good agreement with the results of tunneling, specific heat, and small-angle neutron scattering experiments.