Josephson plasma resonance in Bi2Sr2CaCu2O8+y with spatially dependent interlayer phase coherence
N. Kameda, M. Tokunaga, T. Tamegai, M. Konczykowski, S. Okayasu
DOI 10.1103/PhysRevB.69.180502 · Physical Review B
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Abstract
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 linearized sine-Gordon equation, which takes into account the spatial dependence of IPC, can reproduce most of the experimental findings including the presence of ωcr.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Bi2Sr2CaCu2O8+y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 90 | Pressure unresolved | onset |
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