Final published version
Research output: Contribution to Journal/Magazine › Journal article › peer-review
| <mark>Journal publication date</mark> | 03/1999 |
|---|---|
| <mark>Journal</mark> | Physica B: Condensed Matter |
| Volume | 263-264 |
| Number of pages | 3 |
| Pages (from-to) | 136-138 |
| Publication Status | Published |
| <mark>Original language</mark> | English |
We study spectral statistics of lattice modes in a disordered crystal and in a crystal with a complex unit cell. The correlations of the eigenmode frequencies of a block of a disordered solid is found to obey the GOE Wigner-Dyson statistics. In contrast, the set of eigenfrequencies of a crystal with a complex unit cell taken at the same point Q not equal 0 in the Brillouin zone exhibit correlations specific to the GUE universality class.