K. Niwa, T. Iizuka, M. Kurosawa, Y. Nakamura, H. Okadome Valencia, H. Kishida, O. Nakatsuka, T. Sasaki, N. A. Gaida, M. Hasegawa,, “High-pressure polycrystalline thin-film synthesis and semiconducting property of platinum pernitride”, AIP Adv.,12, (2022), 055318,