Interaction of pancake vortices with c-axis plasmon in Josephson-coupled layered superconductors

The power-law dependence of plasma resonance frequency on magnetic field applied along the c-axis is explained in the model of strong disorder in pancake positions along the c-axis. The line width of plasma resonance is explained by inhomogeneous broadening caused by random positions of pancake vortices in the vortex glass phase. This leads to a nearly temperature independent line width which is inversely proportional to magnetic field. The dynamic interaction of vortices with plasmon is calculated. It is ineffective in fields studied but may become stronger in crystals with weaker pinning or in higher magnetic fields.