Effect of pressure and temperature on Raman scattering and an anharmonicity study of tin dichalcogenide single crystals

Raman spectra of Tin dichalcogenide (SnS2 and SnSe2) single crystals have been measured at high pressures up to 20 GPa and low temperatures up to 80 K. The present study indicates a good stability of these compounds at high pressure and low temperature. Here, we report a detailed temperature-dependent Raman spectroscopic study of A1g phonon mode of Tin dichalcogenide by considering the contributions from thermal expansion and lattice anharmonicity and analyze the data based on known anharmonicity model.