Variety of c-Axis Collective Excitations in Layered Multigap Superconductors
Yukihiro Ota, Masahiko Machida, Tomio Koyama
DOI 10.1103/PhysRevLett.106.157001 · Physical Review Letters
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Abstract
We present a dynamical theory for the phase differences along a stacked direction of intrinsic Josephson junctions (IJJ’s) in layered multigap superconductors, motivated by the discovery of highly anisotropic iron-based superconductors with thick perovskite-type blocking layers. The dynamical equations describing ac and dc intrinsic Josephson effects peculiar to multigap IJJ’s are derived, and collective Leggett mode excitations in addition to the Josephson plasma established in single-gap IJJ’s are predicted. The dispersion relations of their collective modes are explicitly displayed, and the remarkable peculiarity of the Leggett mode is demonstrated.
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 |
| (Fe2As2)(Sr4V2O6) Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| (Fe2P2)(Sr4Sc2O6) Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| (Fe2As2)(Sr4(Mg,Ti)2O6) Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| PrFeAsO0.7 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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