Europhys. Lett, 46 (1), pp. 68-74 (1999)
The Josephson plasma resonance in in a tilted field
S. P. Bayrakci 1, Ophelia K. C. Tsui 1, N. P. Ong 1, K. Kishio 2 and S. Watauchi 2
1 Joseph Henry Laboratories of Physics, Princeton University
Princeton, New Jersey 08544, USA
2 Department of Applied Chemistry, University of Tokyo Hongo, Bunkyo-ku, Tokyo 113, Japan
(received 9 November 1998; accepted in final form 22 January 1999)
PACS. 74.72Hs - High- compounds: Bi-based cuprates.
PACS. 74.50+r - Proximity effects, weak links, tunneling phenomena, and Josephson effect.
PACS. 74.60Ge - Flux pinning, flux creep, and flux-line lattice dynamics.
The dependence of the Josephson plasma frequency in on a tilted field is reported. Measurements over a large range of B and tilt angle 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 (4600 A/cm2 at 30 K). An analogy to Bragg diffraction is described, as well as a picture for the fractional-exponent behavior of vs. .