Phys. Rev. B 17, 2790–2792 (1978)Effect of second-nearest-neighbor forces on the vibrations of amorphous SiO2Received 14 November 1977; published in the issue dated 15 March 1978 A method is presented of solving for the vibrational Green's function of a silicon-dioxide Bethe lattice when it contains second-nearest-neighbor interactions. The method is used to find the density of states of a Bethe lattice constructed with a Keating Hamiltonian. The primary effect of the second-nearest-neighbor interactions is a softening of the rocking bands below 450 cm-1. © 1978 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.17.2790
DOI:
10.1103/PhysRevB.17.2790
PACS:
See AlsoOriginal Article: R. B. Laughlin and J. D. Joannopoulos, Phonons in amorphous silica, Phys. Rev. B 16, 2942 (1977). |
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