Muon-Spin-Rotation Measurements of the Penetration Depth in the   Infinite-Layer Electron-Doped Cuprate Superconductor Sr0.9La0.1CuO2
  Muon spin rotation (mSR) measurements of the in-plane penetration depth lambda_ab have been performed in the electron-doped infinite layer high-Tc superconductor (HTS) Sr0.9La0.1CuO2. Absence of the magnetic rare-earth ions in this compound allowed to measure for the first time the absolute value of lambda_ab(0) in electron-doped HTS using mSR. We found lambda_ab(0)=116(2) nm. The zero-temperature depolarization rate sigma(0)?1/lambda_ab(0)^2=4.6(1) MHz is more than four times higher than expected from the Uemura line. Therefore this electron-doped HTS does not follow the Uemura relation found for hole-doped HTS. 
A. Shengelaya, R. Khasanov, D.G. Eshchenko, D. Di Castro, I.M. Savic,   M.S. Park, K.H. Kim, Sung-Ik Lee, K.A. Muller, and H...