The one-band density of states for the Polk model for amorphous semiconductors is found by direct diagonalization for a 201-atom structure and some smaller structures. It is seen that the density of states has a definite two-peaked character. Implications for the lower half of the valence band and the middle portion of the vibrational density of states in amorphous silicon and germanium are discussed.
All Science Journal Classification (ASJC) codes
- Condensed Matter Physics
- Physics and Astronomy(all)