Discriminating the superconducting gap from the pseudogap in Bi2Sr2CaCu2O8+δ by interlayer tunneling spectroscopy

被引：123

作者：

Suzuki, M ^{[1
]}

Watanabe, T

机构：

[1] Kyoto Univ, Dept Elect Sci & Engn, Kyoto 6068501, Japan

[2] Nippon Telegraph & Telephone Corp, Basic Res Labs, Atsugi, Kanagawa 2430198, Japan

来源：

PHYSICAL REVIEW LETTERS | 2000年 / 85卷 / 22期

关键词：

D O I：

10.1103/PhysRevLett.85.4787

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Tunneling spectroscopy using a very thin stack of intrinsic Josephson junctions has revealed that the superconducting gap is definitely different from the pseudogap in the Bi2Sr2CaCu2O8+delta system. In the underdoped region, the conductance peak arising from the superconducting gap is independently observed in the dI/dV-V curve and its position is much lower than that of the pseudogap. Near the optimum doping level and in the overdoped region, both peaks are located in close proximity. These findings are in conflict with a previous understanding of the pseudogap.

引用

页码：4787 / 4790

页数：4

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