Total energy curves for silicon and germanium in the diamond, Z, bct, and M phases. The symbols correspond to the calculated data, and the lines are fits to the BM equation of state.
Phonon dispersion relations for silicon and germanium at the M and Z phases.
Enthalpy pressure curves for different phases of silicon and germanium. Black lines, red [gray] squares, green [medium gray] triangles, and yellow [light gray] triangles correspond to diamond, Z, and M phases, respectively.
Energy band structure along high-symmetry lines of the Brillouin zone for silicon and germanium in the M and Z phases. Red lines correspond to DFT, while solid lines correspond to the G0W0 calculation.
Frequency dependence of the imaginary part of the dielectric function for silicon and germanium in the diamond (black line), M (green [medium gray] line and square symbols), and Z (red [gray] line and circle symbols) phases.
Cell parameters and bulk modulus for silicon and germanium in the diamond, M and Z phases.
Elastic constants for silicon and germanium in the diamond, M and Z phases.
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