Physical Review Letters · 1972 · 63 citations · 10 references
Natural SciencesMaterials SciencePhysicsCondensed Matter PhysicsSemiconductor MaterialsSolid State PhysicsAmorphous MaterialsAmorphous SemiconductorsAmorphous SolidsElectronic Band StructureElectronic Structure Of SolidsSemiconductor PhysicsAtomic BondingBendingElectronic Density Of StatesElectronic Structure Of Amorphous MaterialsInorganic SemiconductorsPhonon Density Of StatesPhonon DynamicsPhonons
A theorem is presented which establishes an isomorphism between the eigenvalues of Keating's model Hamiltonian for the vibrations of tetrahedrally bonded solids, in the limit in which bond-bending forces are zero, and those of a simple "one-band" Hamiltonian which has been found useful in understanding features of the electronic density of states of amorphous semiconductors. We explain the similarity of the phonon spectra of amorphous and crystalline group-IV semiconductors, demonstrated in various recent experiments.
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Raman Spectra of Amorphous Si and Related Tetrahedrally Bonded Semiconductors
J.E. Smith, M. H. Brodsky, B. L. Crowder et al. · Physical Review Letters · 1971 · 379 citations
X-Ray Photoemission Spectra of Crystalline and Amorphous Si and Ge Valence Bands
L. Ley, S. P. Kowalczyk, R. A. Pollak et al. · Physical Review Letters · 1972 · 367 citations · Full text