Josephson plasma mode in the mixed state of long-junction and layered superconductors
L. N. Bulaevskii, D. Domínguez, M. P. Maley, A. R. Bishop
DOI 10.1103/PhysRevB.55.8482 · Physical Review B
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Abstract
We consider the Josephson plasma mode in the mixed state of a single Josephson junction and of a layered superconductor. We focus on the frequencies and optical weights of plasma modes which can be excited by an external spatially homogeneous ac electric field in the mixed state. Our consideration is based on the sum rules for the dielectric function which describe the response of a Josephson coupled system to an ac electric field. We show that for a single Josephson junction in a parallel field the plasma frequency increases with a magnetic field applied parallel to the junction. For layered superconductors we discuss qualitatively the angular dependence of the plasma frequency for a tilted magnetic field using an interpolation between results known for perpendicular and parallel fields. We predict that two plasma peaks may be observed in magnetic fields of the order H0=Φ0/γs2, orientated close to the ab plane, and that the plasma frequency increases with increasing magnetic field B⩽H0 applied parallel to the layers.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Bi2Sr2CaCu2O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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