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Substrate-Affected Lattice Structural Evolution in Compressed Monolayer ReS2

Abstract

At ambient condition, the lattice structure of supported ultrathin transition metal dichalcogenides (TMDs) can be effectively modified by substrate. When compressed, the effect of substrate is far from settled. In this study, the impact of Si substrate on the lattice structure of compressed monolayer and multilayer ReS2 were investigated by performing high-pressure Raman measurements and first-principles calculations. Our results reveal a substrate-affected strain in compressed monolayer ReS2, which will result in the distorted unit with the S atoms sliding within a single layer, evidenced by the split of Ag-5 mode after 1.7 GPa. However, distinct from monolayer ReS2, the Ag-5 mode of multilayer ReS2 remains well-symmetric up to 4.2 GPa, which can be attributed to the weaker substrate-affected strain in compressed multilayer ReS2 when compared with monolayer ReS2. The obviously different high-pressure responses between multilayer ReS2 and monolayer ReS2 can be attributed to the effect of interlayer interaction, and the split of Ag-5 mode provides a clear indication for the prominent strain in compressed supported ReS2.

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Publication details

The article was received on 12 Jun 2018, accepted on 06 Sep 2018 and first published on 08 Sep 2018


Article type: Paper
DOI: 10.1039/C8CP03701A
Citation: Phys. Chem. Chem. Phys., 2018, Accepted Manuscript
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    Substrate-Affected Lattice Structural Evolution in Compressed Monolayer ReS2

    Y. Yan, H. Liu, Y. Han, F. Li and C. Gao, Phys. Chem. Chem. Phys., 2018, Accepted Manuscript , DOI: 10.1039/C8CP03701A

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