We study the Josephson plasma resonance (JPR) in Bi2Sr2CaCu2O8+y (BSCCO) with spatially dependent interlayer-phase coherence (IPC). The half-irradiated BSCCO (HI-BSCCO), in which columnar defects are introduced only in a half of the sample, shows several resonance peaks, which are not simple superposition of the peaks in irradiated- and pristine-parts. JPR in HI-BSCCO changes its character from irradiated- to pristine-type at a crossover frequency (ωcr). We demonstrate that the one-dimensional \LSGE, which takes into account the spatial dependence of IPC, can reproduce most of the experimental findings including the presence of ωcr.
@article{arxiv.cond-mat/0404120,
title = {Josephson Plasma Resonance in $Bi_2 Sr_2 Ca Cu_2 O_{8+y}$ with Spatially Dependent Interlayer-Phase Coherence},
author = {N. Kameda and M. Tokunaga and T. Tamegai and M. Konczykowski and S. Okayasu},
journal= {arXiv preprint arXiv:cond-mat/0404120},
year = {2009}
}