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d-like Symmetry of the Order Parameter and Intrinsic Josephson Effects in Bi2212 Cross-Whisker Junctions

Yoshihiko Takano·Takeshi Hatano·Akihiro Fukuyo·Akira Ishii·Masashi Ohmori·Shunichi Arisawa·Kazumasa Togano·Masashi Tachiki
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Abstract

An intrinsic tunnel junction was made using two Bi-2212 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-whiskers junctions show a multiple-branch structure at any cross-angle, indicating the formation of the intrinsic Josephson junction array.

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Yoshihiko Takano, Takeshi Hatano, Akihiro Fukuyo, Akira Ishii, Masashi Ohmori, Shunichi Arisawa, Kazumasa Togano, Masashi Tachiki. 2002-12-06. d-like Symmetry of the Order Parameter and Intrinsic Josephson Effects in Bi2212 Cross-Whisker Junctions. https://doi.org/10.1103/physrevb.65.140513

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