K.A. Chao
Physical Review B
We have developed an approach to grow high quality ultra-thin films of La2-xSrxCuO4 with molecular beam epitaxy, by adding a homoepitaxial buffer layer in order to minimize the degradation of the film structure at the interface. The advantage of this method is to enable a further reduction of the minimal thickness of a superconducting La 1.9Sr0.1CuO4 film. The main result of our work is that a single unit cell (only two copper oxide planes) grown on a SrLaAlO4 substrate exhibits a superconducting transition at 12.5 K (zero resistance) and an in-plane magnetic penetration depth λ ab(0) = 535 nm. © 2003 Elsevier Ltd. All rights reserved.
K.A. Chao
Physical Review B
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