The Josephson Plasma Resonance in Bi2Sr2CaCu2O8 in a Tilted Field
Abstract
The dependence of the Josephson plasma frequency omegap in Bi2Sr2CaCu2O8 on a tilted field H is reported. Measurements over a large range of B and tilt angle theta allow a detailed comparison with a recent calculation by Koshelev. With a slight modification of the model, close agreement is obtained. From the fits, we find values for the in-plane correlation length and the zero-field critical current density Jc0 (4,600 A/cm2 at 30 K). An analogy to Bragg diffraction is described, as well as a picture for the fractional-exponent behavior of omegap versus H.
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