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

A. Shengelaya; R. Khasanov; D. G. Eshchenko; D. Di Castro; I. M. Savić; M. S. Park; K. H. Kim; Sung-Ik Lee; K. A. Müller; H. Keller

doi:10.1103/PhysRevLett.94.127001

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

A. Shengelaya, R. Khasanov, D. G. Eshchenko, D. Di Castro, I. M. Savić, M. S. Park, K. H. Kim, Sung-Ik Lee, K. A. Müller, H. Keller

DOI 10.1103/PhysRevLett.94.127001 · Physical Review Letters

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Abstract

Muon-spin-rotation (μSR) measurements of the in-plane penetration depth λab have been performed in the infinite-layer electron-doped Sr0.9La0.1CuO2 high-Tc superconductor (HTS). Absence of the magnetic rare-earth ions in this compound allowed us to measure for the first time the absolute value of λab(0) in electron-doped HTSs using μSR. We found λab(0)=116(2) nm. The zero-temperature depolarization rate σ(0)∝1/λab2(0)=4.6(1) μs−1 is more than 4 times higher than expected from the Uemura line. Therefore, this electron-doped HTS does not follow the Uemura relation found for hole-doped HTSs.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Sr0.9La0.1CuO2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	43	Pressure not reported	unknown
Sr0.9La0.1CuO2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	43	Pressure not reported	unknown
Nd1.85Ce0.15CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown