【摘 要】
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In this study, we have explored the ways to fabricate and optimize high-quality ultrathin YBa2Cu3O7?δ (YBCO) films grown on single-crystal (001) SrTiO3 substra
【机 构】
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Interdisciplinary Center of Quantum Information, Zhejiang Province Key Laboratory of Quantum Technol
论文部分内容阅读
In this study, we have explored the ways to fabricate and optimize high-quality ultrathin YBa2Cu3O7?δ (YBCO) films grown on single-crystal (001) SrTiO3 substrates. Nearly atomic-fl at YBCO films are obtained by pulsed laser deposition. Our result shows that the termination of SrTiO3 has only a negligible effect on the properties of YBCO. In contrast, we found that capping a non-superconducting oxide layer can generally enhance the superconductivity of YBCO. PrBa2Cu3O7, La2CuO4, LaMnO3, SrTiO3, and LaAlO3 have been examined as capping layers, and the minimum thickness of supercon-ducting YBCO with capping is～2 unit cells–3 unit cells. This result might be useful in constructing good-performance YBCO-based field effect devices.
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