D Katsube, R. Shimizu, Y. Sugimoto, T. Hitosugi, and M. Abe, “Identification of OH groups on SrTiO3(100)-(R13xR13)-R33.7° reconstructed surface by non-contact atomic force microscopy and scanning tunneling microscopy”, Appl. Phys. Lett. Vol. 122 (7), (2023) 071602-1-16