Abstract
We present a computationally efficient first-principles scheme to calculate for crystalline insulators, including the electron-hole interaction. The effective Hamiltonian for electron-hole pairs contains both the exchange and direct parts of this interaction. An iterative scheme is used in which the moments of are computed by repeated action of the Hamiltonian on electron-hole pair states. The scheme is applied to two insulators where there are significant experimental uncertainties in their ultraviolet optical properties: GaN and
- Received 3 September 1998
DOI:https://doi.org/10.1103/PhysRevB.59.5441
©1999 American Physical Society