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Correlations in optical phonon spectra of complex solids.

Research output: Contribution to journalJournal article

<mark>Journal publication date</mark>2000
<mark>Journal</mark>Physical Review B
Number of pages4
Pages (from-to)9851-9854
<mark>Original language</mark>English


Spectral correlations in the optical phonon spectrum of a solid with a complex unit cell are analyzed 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.