1. “Metal-insulator transition of      SrVO 3 ultrathin films embedded in      SrVO 3 /   SrTiO 3 superlattices”. Wang J, Gauquelin N, Huijben M, Verbeeck J, Rijnders G, Koster G, Applied Physics Letters 117, 133105 (2020).   http://doi.org/10.1063/5.0020615