Josephson coupling and plasma resonance in a vortex crystal

摘要: The authors consider the magnetic field dependence of plasma resonance frequency in vortex crystal state. found that low induces a small correction to proportional field. slope this linear is directly related average distance between pancake vortices neighboring layers, wandering length. This length determined by both Josephson and couplings layers. At higher fields coupling suppressed collectively elastic energy lattice. Analyzing experimental data, they (1) becomes comparable with London penetration depth near {Tc}, (2) at melting (< 20 G) does not change much transition demonstrating existence line liquid phase range, (3) self consistent theory fluctuations describes very well up point.