Is La1.85Y0.15CuO4 an oxygen-doped cuprate superconductor?
W. Yu, B. Liang, P. Li, S. Fujino, T. Murakami, I. Takeuchi, R. L. Greene
Abstract
We report resistivity, Hall effect, Nernst effect, and magnetoresistance measurements on T'-phase La1.85Y0.15CuO (LYCO) films prepared by pulsed laser deposition under different oxygen conditions. Our results show that superconductivity in LYCO originates from an oxygen-doped Mott-like insulator and not from a weakly correlated, half-filled band metal as proposed previously.
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