Crystal growth and elastic properties of In2Se3

Perfect α-In2Se3 single crystals have been grown, and ultrasound velocities, v i (i = 1–7), have been measured in single-crystal α-In2Se3 in various directions for different polarizations. We have determined the components of its elastic tensor (C ij ) and calculated its elastic characteristics: elastic compliance, Young's modulus, shear modulus, linear and volume compressibilities, bulk modulus, and Poisson's ratio.