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New Pressure Stabilization Structure in Two-Dimensional PtSe.
J Phys Chem Lett
September 2020
Technical Center for Multifunctional Magneto-Optical Spectroscopy (Shanghai), Engineering Research Center of Nanophotonics & Advanced Instrument (Ministry of Education), Department of Materials, School of Physics and Electronic Science, East China Normal University, Shanghai 200241, China.
The frequency shifts and lattice dynamics to unveil the vibrational properties of platinum diselenide (PtSe) are investigated using pressure-dependent polarized Raman scattering at room temperature up to 25 GPa. The two phonon modes E and A display similar hardening trends; both the Raman peak positions and full widths at half-maximum have distinct mutation phenomena under high pressure. Especially, the split E mode at 4.
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