Abstract
We discuss the possible existance of transverse optical plasma modes in superlattices consisting of Josephson coupled superconducting layers. These modes appear as resonances in the current-current correlation function, as opposed to the usual plasmons which are poles in the density-density channel. We consider both bilayer superlattices, and single layer lattices with a spread of interlayer Josephson couplings. We show that our model is in quantitative agreement with the recent experimental observation by a number of groups of a peak at the Josephson plasma frequency in the optical conductivity of La1.85Sr0.15CuO4.
Original language | English |
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Pages (from-to) | 3165-3168 |
Number of pages | 4 |
Journal | Czechoslovak Journal of Physics |
Volume | 46 |
DOIs | |
Publication status | Published - 1996 |
Event | 21st International Conference on Low Temperature Physics (LT 21) - , Czech Republic Duration: 8-Aug-1996 → 14-Aug-1996 |
Keywords
- CUPRATE SUPERCONDUCTORS
- COLLECTIVE MODES
- RESONANCE
- PHASE