Subgap Structures in Intrinsic Josephson Junctions of Tl2Ba2Ca2Cu3O10+δ and Bi2Sr2CaCu2O8+δ
K. Schlenga, G. Hechtfischer, R. Kleiner, W. Walkenhorst, P. Müller, H. L. Johnson, M. Veith, W. Brodkorb, E. Steinbeiss
DOI 10.1103/PhysRevLett.76.4943 · Physical Review Letters
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Abstract
We report on pronounced structures in the current-voltage characteristics of intrinsic Josephson junctions in the high- Tc superconductors Tl2Ba2Ca2Cu3O10+δ and Bi2Sr2CaCu2O8+δ. The structures appear well below the superconducting gap, independent of sample geometry, magnetic field, and temperature up to 0.5Tc. We discuss possible explanations and show that the structures could be explained by a single peak in the quasiparticle current, possibly arising from a subgap structure in the quasiparticle density of states. For superconducting superlattices a subgap peak has been predicted and could explain our results.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Tl2Ba2Ca2Cu3O10+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 109 | Pressure not reported | unknown |
| Tl2Ba2Ca2Cu3O10+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 108 | Pressure not reported | unknown |
| Tl2Ba2Ca2Cu3O10+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 115 | Pressure not reported | unknown |
| Tl2Ba2Ca2Cu3O10+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 114 | Pressure not reported | unknown |
| Bi2Sr2CaCu2O8+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 91 | Pressure not reported | unknown |
| Bi2Sr2CaCu2O8+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 87 | Pressure not reported | unknown |
| Bi2Sr2CaCu2O8+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 88 | Pressure not reported | unknown |
| Bi2Sr2CaCu2O8+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 80 | Pressure not reported | unknown |
| Bi2Sr2CaCu2O8+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 84 | Pressure not reported | unknown |
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