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-x Sr x CuO4 (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 (mu 0 H c2), 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.
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Technological Centre, Moscow Institute of Electronic Technology (Technical University), MoscowTechnological Centre, Moscow Institute of Electronic Technology (Technical University), Moscow
Dyagilev V.V.
Saurov A.N.
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Technological Centre, Moscow Institute of Electronic Technology (Technical University), MoscowTechnological Centre, Moscow Institute of Electronic Technology (Technical University), Moscow
Saurov A.N.
Reznev A.A.
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Federal Security Service Research Institute, Federal Security ServiceTechnological Centre, Moscow Institute of Electronic Technology (Technical University), Moscow
Reznev A.A.
Kasatkin S.I.
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Institute of Control Sciences, Russian Academy of Sciences, MoscowTechnological Centre, Moscow Institute of Electronic Technology (Technical University), Moscow
Kasatkin S.I.
Murav'jev A.M.
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Institute of Control Sciences, Russian Academy of Sciences, MoscowTechnological Centre, Moscow Institute of Electronic Technology (Technical University), Moscow
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Chinese Acad Sci, Suzhou Inst Nanotech & Nanobion, Nanobion Div, Suzhou 215123, Peoples R China
Chinese Acad Sci, Suzhou Inst Nanotech & Nanobion, I Lab, Suzhou 215123, Peoples R ChinaChinese Acad Sci, Suzhou Inst Nanotech & Nanobion, Nanobion Div, Suzhou 215123, Peoples R China
Wang, Dong
Wang, Zhenggong
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Chinese Acad Sci, Suzhou Inst Nanotech & Nanobion, Nanobion Div, Suzhou 215123, Peoples R China
Chinese Acad Sci, Suzhou Inst Nanotech & Nanobion, I Lab, Suzhou 215123, Peoples R China
Univ Chinese Acad Sci, Beijing 100049, Peoples R ChinaChinese Acad Sci, Suzhou Inst Nanotech & Nanobion, Nanobion Div, Suzhou 215123, Peoples R China