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

cond-mat.supr-con

/ Authors

R. Khasanov, A. Shengelaya, A. Maisuradze, D. Di Castro, I. M. Savić, S. Weyeneth, M. S. Park, D. J. Jang, S. -I. Lee, H. Keller

/ Abstract

We report on measurements of the in-plane magnetic penetration depth λ_{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 λ_{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.