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- W4299570218 abstract "SnxSey crystalline compounds consisting of Sn and Se atoms of varying composition are systematically investigated at pressures from 0 to 100 GPa using the first-principles evolutionary crystal structure search method based on density functional theory (DFT). All known experimental phases of SnSe and SnSe2 are found without any prior input. A second order polymorphic phase transition from SnSe-Pnma phase to SnSe-Cmcm phase is predicted at 2.5 GPa. Initially being semiconducting, this phase becomes metallic at 7.3 GPa. Upon further increase of pressure up to 36.6 GPa, SnSe-Cmcm phase is transformed to CsCl-type SnSe-Pm3m phase, which remains stable at even higher pressures. A metallic compound with different stoichiometry, Sn3Se4-I43d, is found to be thermodynamically stable from 18 GPa to 70 GPa. Known semiconductor tin diselenide SnSe2-P3m1 phase is found to be thermodynamically stable from ambient pressure up to 18 GPa. Initially being semiconducting, it experiences metalization at pressures above 8 GPa." @default.
- W4299570218 created "2022-10-02" @default.
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- W4299570218 date "2017-09-21" @default.
- W4299570218 modified "2023-09-26" @default.
- W4299570218 title "Tin-selenium compounds at ambient and high pressures" @default.
- W4299570218 doi "https://doi.org/10.48550/arxiv.1709.07570" @default.
- W4299570218 hasPublicationYear "2017" @default.
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