In-situ epitaxial growth of superconducting La-based bilayer cuprate thin films

Details In-situ epitaxial growth of superconducting La-based bilayer cuprate thin films In-situ epitaxial growth of superconducting La-based bilayer cuprate thin films

2003-12-17

arxiv.org/abs/cond-mat/0312428v1

Physics

Condensed Matter

Superconductivity

5 pages, 3 figures, To appear in Phys. Rev. B, Rapid Communications

Scientific paper

10.1103/PhysRevB.69.020504

We investigate the epitaxial growth of bilayer cuprate La2CaCu2O6+\delta using pure ozone as an oxidant, and find that even the crystal with parent composition without cation substitution can show metallic behavior with the aid of epitaxial strain effect. The hole concentration is controlled simply by excess-oxygen doping, and the films grown under the optimum conditions exhibit superconductivity below 30 K. This is the first result on the superconductivity of bilayer La2CaCu2O6+\delta induced purely by the excess oxygen.

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