Extraordinarily Strong Interlayer Interaction in 2D Layered PtS2.

Zhao, Yuda; Qiao, Jingsi; Yu, Peng; Hu, Zhixin; Lin, Ziyuan; Lau, Shu Ping; Liu, Zheng; Ji, Wei et al. · Adv Mater · 2016

basic_science · Level V

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Abstract

Platinum disulfide (PtS2 ), a new member of the group-10 transition-metal dichalcogenides, is studied experimentally and theoretically. The indirect bandgap of PtS2 can be drastically tuned from 1.6 eV (monolayer) to 0.25 eV (bulk counterpart), and the interlayer mechanical coupling is almost isotropic. It can be explained by strongly interlayer interaction from the pz orbital hybridization of S atoms.