Abstract
Chakravarty, Sudbø, Anderson, and Strong have introduced a simple model for high Tc oxides based on the effect of Cooper pair tunneling in a bilayer (with strength TJ) with s-wave pairing (g) in the layers. We discuss the order parameter fluctuations of this model. Besides the usual Anderson-Bogoliubov phase and Littlewood-Varma amplitude modes, we find new out-of-phase phase and amplitude modes. Their energy and damping depend critically on whether TJ>g or TJ<g. Such fluctuations in the relative phase and amplitude of two coupled condensates were first discussed in a different system by Leggett in 1966.
| Original language | English |
|---|---|
| Pages (from-to) | 158-161 |
| Number of pages | 4 |
| Journal | Physical Review Letters |
| Volume | 74 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 1995 |
| Externally published | Yes |
ASJC Scopus subject areas
- General Physics and Astronomy