Thermal expansion and temperature dependence of Raman modes in epitaxial layers of Ge and Ge${}_{1-x}$Sn${}_x$

Agnieszka Anna Corley-Wiciak, Diana Ryzhak, Marvin Hartwig Zoellner +7

Temperature dependence of vibrational modes in semiconductors depends on lattice thermal expansion and anharmonic phonon-phonon scattering. Evaluating the two contributions from ex…