Phys. Rev. B 17, 1778–1784 (1978)Excitations in amorphous pyramidally bonded solids. II. PhononsReceived 29 July 1977; published in the issue dated 15 February 1978 Phonon state densities are calculated for crystalline and amorphous As. The results indicate a strong analogy between the electronic p states and the vibrational states. This isomorphism is used to derive relationships between the electronic and phonon coupling constants. The effects of topology upon the vibrational excitations in pyramidal solids are studied. A new model for infrared absorption is presented. The resulting spectra agree well with experimental measurements. Finally, inelastic neutron-structure factors are calculated and are used to interpret recent experimental results. © 1978 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.17.1778
DOI:
10.1103/PhysRevB.17.1778
PACS:
See AlsoSee Also: W. B. Pollard and J. D. Joannopoulos, Excitations in amorphous pyramidally bonded solids. I. Electrons, Phys. Rev. B 17, 1770 (1978). |
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