title: Phase transitions and electron-phonon coupling in platinum hydride.
abstract: Structural phase transitions and superconducting properties of platinum hydride under pressure are explored through the first-principles calculations based on the density functional theory. Three new low-pressure phases (Pm3m, Cmmm and P4/nmm) are predicted, and all of them are metallic and stable relative to decomposed cases. The superconducting critical temperature of two high-pressure phases correlates with the electron-phonon coupling. The presence of soft modes induced by Kohn anomalies and the hybridization between H and Pt atoms result in the strong electron-phonon coupling. Our results have major implications for other transition metal hydrides under pressure.
authors.affiliation: Beijing Computational Science Research Center, Beijing, People's Republic of China.
authors.forename: Chao
authors.initials: C
authors.lastname: Zhang
authors.forename: Xiao-Jia
authors.initials: XJ
authors.lastname: Chen
authors.forename: Hai-Qing
authors.initials: HQ
authors.lastname: Lin