Bi2212 <i>c</i>-Axis Twist Bicrystal and Artificial and Natural Cross-Whisker Josephson Junctions: Strong Evidence for s-Wave Superconductivity and Incoherent <i>c</i>-Axis Tunneling期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

Bi2212 c-Axis Twist Bicrystal and Artificial and Natural Cross-Whisker Josephson Junctions: Strong Evidence for s-Wave Superconductivity and Incoherent c-Axis Tunneling

Authors:	Richard A Klemm

Affiliation:	(1) Department of Physics, Kansas State University, Manhattan, KS 66506, USA

Abstract:	We discuss the latest data from c-axis twist Josephson junction experiments on Bi₂Sr₂CaCu₂O $_{8+\delta}$ (Bi2212) bicrystals and on artificially and naturally formed cross whiskers. All three experiments provide strong evidence for a dominant s-wave order parameter for $T\le T_{\rm c}$ . The bicrystal and natural cross-whisker data also provide strong evidence for incoherent c-axis tunneling across the intrinsic Bi2212 junctions, consistent with a strongly inhomogeneous material.

Keywords:	Josephson junction cuprates superconducting order parameter
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