Excitation of the Josephson Plasma Mode in Bi2Sr2CaCu2O8+δ in an Oblique Field
Ophelia K. C. Tsui, N. P. Ong, J. B. Peterson
DOI 10.1103/PhysRevLett.76.819 · Physical Review Letters
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Abstract
We present evidence identifying the resonance in microwave absorption observed in Bi2Sr2CaCu2O8+δ in a field H as the Josephson plasma mode. The resonance field displays an unusual reentrant cusp when H is very close to alignment with the layers. By fitting to a model of Bulaevskii et al., we obtain an anisotropy parameter γ=400–420 at 5 K, and a Josephson plasma frequency ωJ equal to 5.3 cm–1 (at H=0). We also describe the dependence of ωJ on H and T when the applied field H∥c.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Bi2Sr2CaCu2O8+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 85 | Pressure not reported | unknown |
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