Polariton-like interaction between microwaves and electronic subsystem of metal oxide superconductor

摘要

In studying the microwave (10 GHz) response of both single crystal and ceramic samples of the YBa2Cu3O7 in Nb resonator we have found dielectric permittivity dependent strongly on wave-vector resulting in appearance of the new dielectric resonances with hysteretic temperature behaviour. Data show the importance of the nonconducting "bound" electron polarization in strong local fields and spatial dispersion, which lead to the polariton-like interaction between microwaves and electrons in a high-T-c superconductor. The effects of the polariton-like microwave excitations on the limiting mechanisms in superconducting cavities are discussed. [References: 1]