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Muon-Spin-Rotation Measurements of the Penetration Depth in the Infinite-Layer Electron-Doped Cuprate Superconductor Sr0.9La0.1CuO2

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·H. Keller
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Abstract

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.

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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, H. Keller. 2005-03-08. Muon-Spin-Rotation Measurements of the Penetration Depth in the Infinite-Layer Electron-Doped Cuprate Superconductor Sr0.9La0.1CuO2. https://doi.org/10.1103/physrevlett.94.127001

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