Anomalous dependence of the c-axis polarized Fe B${}_{1g}$ phonon mode with Fe and Se concentrations in Fe${}_{1+y}$Te${}_{1-x}$Se${}_x$

Y. J. Um, A. Subedi, P. Toulemonde +10

We report an investigation of the lattice dynamical properties in a range of Fe${}_{1+y}$Te${}_{1-x}$Se${}_x$ compounds, with special emphasis on the c-axis polarized vibration of Fe w…