Roles of the lower and the upper Hubbard bands and the donor-excitonic states in the theory of shallow-impurity states in doped semiconductors
- 15 June 1980
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 21 (12) , 5745-5748
- https://doi.org/10.1103/physrevb.21.5745
Abstract
A self-consistent unrestricted Hartree-Fock pseudocluster calculation has been performed to investigate the roles of various bands in doped semiconductors. While the lower and the upper Hubbard bands of the Mott-Hubbard-Anderson (MHA) model are well defined at low concentration, the donor-excitonic states are important at higher concentration where the upper Hubbard band is pushed into the conduction band. The so modified MHA model can still explain almost all the experimental results.Keywords
This publication has 18 references indexed in Scilit:
- Density-Functional Approach to the Metal-Insulator Transition in Doped SemiconductorsPhysical Review Letters, 1978
- Extrinsic heat capacity in the metallic regime of heavily doped silicon and germaniumPhysical Review B, 1978
- The Hubbard Model for the Structurally Random SystemJournal of the Physics Society Japan, 1976
- Properties of the Hubbard Model for the Arbitrary Numbers of Up and Down Ship ElectronsJournal of the Physics Society Japan, 1975
- Numerical Studies of Localization in Structurally Disordered SystemsJournal of the Physics Society Japan, 1974
- Electron correlations and metal-insulator transition in structurally disordered systems: General theory and application to supercritical alkali metalsPhysical Review B, 1974
- Impurity Band Conduction with Strong Electron CorrelationsJournal of the Physics Society Japan, 1968
- Electron correlations in narrow energy bands III. An improved solutionProceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 1964
- Electron correlations in narrow energy bandsProceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 1963
- Absence of Diffusion in Certain Random LatticesPhysical Review B, 1958