首页|Ultrathin Limit on the Anisotropic Superconductivity of Single-Layered Cuprate Films
Ultrathin Limit on the Anisotropic Superconductivity of Single-Layered Cuprate Films
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Exploring dimensionality effects on cuprates is important for understanding the nature of high-temperature superconductivity.By atomically layer-by-layer growth with oxide molecular beam epitaxy,we demonstrate that La2-xSrxCuO4(x=0.15)thin films remain superconducting down to 2 unit cells of thickness but quickly reach the maximum superconducting transition temperature at and above 4 unit cells.By fitting the critical magnetic field(μoHc2),we show that the anisotropy of the film's superconductivity increases with decreasing film thickness,indicating that the superconductivity of the film gradually evolves from weak three-to two-dimensional character.These results are helpful to gain more insight into the nature of high-temperature superconductivity with dimensionality.
冉峰、陈潘、李丁艺、熊沛雨、樊子鑫、凌浩铭、梁艳、张坚地
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Beijing National Laboratory for Condensed Matter Physics,Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China
School of Physical Sciences,University of Chinese Academy of Sciences,Beijing 100049,China
National Key Research and Development Program of ChinaNational Natural Science Foundation of China
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