d-like symmetry of the order parameter and intrinsic Josephson effects in Bi2Sr2CaCu2O8+δ cross-whisker junctions
Yoshihiko Takano, Takeshi Hatano, Akihiro Fukuyo, Akira Ishii, Masashi Ohmori, Shunichi Arisawa, Kazumasa Togano, Masashi Tachiki
DOI 10.1103/PhysRevB.65.140513 · Physical Review B
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Abstract
An intrinsic tunnel junction was made using two Bi2Sr2CaCu2O8+δ single-crystal whiskers. The two whiskers with a cross angle were overlaid at their c planes and connected by annealing. The angular dependence of the critical current density along the c axis is of the d-wave symmetry. However, the angular dependence is much stronger than that of the conventional d wave. Furthermore, the current vs voltage characteristics of the cross-whisker junctions show a multiple-branch structure at any cross angle, indicating the formation of the intrinsic Josephson-junction array.
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. | — | Pressure not reported | unknown |
| YBa2Cu3O7 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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