Abstract
A variety of physical systems, as for example, Jahn-Teller crystals, the coupled phonon-pseudospin model of the ferroelectric KDP (KH2PO4), one-dimensional conductors, and the Dicke model of super-radiance, are characterized by linear couplings between bosons (e.g., phonons) and other dynamic variables (e.g., electrons). Using a general Hamiltonian we explore various properties of such systems. We find that there are exact relations connecting the phonon static correlation functions to those of the electrons. A similar set of relations is also derived for their relaxation functions. The dynamics is then studied employing a relaxation-function formalism.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 1139-1146 |
| Number of pages | 8 |
| Journal | Physical Review B |
| Volume | 20 |
| Issue number | 3 |
| DOIs | |
| State | Published - 1979 |
ASJC Scopus subject areas
- Condensed Matter Physics