Layer breathing Raman mode in two-dimensional van der Waals magnet Cr2Ge2Te6
We report the observation of a weak broad mode with characteristic dependence on thickness of flakes suggesting this as a layer breathing (LB) mode in Cr2Ge2Te6 (CGT) measured using Raman spectroscopy. Symmetry analysis confirms that the CGT falls under the non-polar category of layered material. The evolution of the L...