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\bibitem{Wang_etal2020} {\textquotedblleft}\textit{Metal-insulator transition of      SrVO 3 ultrathin films embedded in      SrVO 3 /   SrTiO 3 superlattices}{\textquotedblright}. Wang J, Gauquelin N, Huijben M, Verbeeck J, Rijnders G, Koster G, Applied Physics Letters \textbf{117}, 133105 (2020).   http://doi.org/10.1063/5.0020615

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