Temperature-dependent vibrational properties of SbxSn1−xSe2 (x = 0, 0.1, 0.2 & 0.3) ternary alloys

Abstract

We report the Raman spectroscopy of SbxSn1−xSe2 (x = 0, 0.1, 0.2, 0.3) single crystals in temperature range 78 K–468 K. The strong peak, assigning A1g-vibrational mode, is found. The frequency of A1g peak decreases on increasing Sb concentration. The downshift is observed on increasing the temperature from 78 to 468 K. For the quantitative analysis, temperature coefficient (χo), peak position at 0 K (ω0), Anharmonic constant (Г0), and peak broadening at 0 K (C) are computed from the temperature dependence of frequency and peak width. The present findings provide a good scientific significance to qualitative and quantitative analyses of transition metal dichalcogenides.