Correlations in optical phonon spectra of complex solids

Details Correlations in optical phonon spectra of complex solids Correlations in optical phonon spectra of complex solids

1999-10-27

arxiv.org/abs/cond-mat/9910464v1

Phys. Rev. B 61, pp 9851-9854 (2000)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages. 3 figures and table included

Scientific paper

10.1103/PhysRevB.61.9851

Spectral correlations in the optical phonon spectrum of a solid with a complex unit cell are analysed using the Wigner-Dyson statistical approach. Despite the fact that all force constants are real, we find that the statistics are predominantly of the GUE type depending on the location within the Brillouin zone of a crystal and the unit cell symmetry. Analytic and numerical results for the crossover from GOE to GUE statistics are presented.

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