Interlayer tunneling spectroscopy of Bi2Sr2CaCu2O8+δ:: A look from inside on the doping phase diagram of high-Tc superconductors -: art. no. 140504

被引：59

作者：

Krasnov, VM ^{[1
]}

机构：

[1] Chalmers Univ Technol, Dept Microelect & Nanosci, S-41296 Gothenburg, Sweden

来源：

PHYSICAL REVIEW B | 2002年 / 65卷 / 14期

关键词：

D O I：

10.1103/PhysRevB.65.140504

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A systematic, doping-dependent interlayer tunneling spectroscopy of Bi2212 high-T-c superconductor is presented. An improved resolution made it possible to simultaneously trace the superconducting gap (SG) and the normal state pseudogap (PG) in a close vicinity of T-c and to analyze closing of the PG at T-*. The obtained doping phase diagram exhibits a critical doping point for appearance of the PG and a characteristic crossing of the SG and the PG close to the optimal doping. This points towards coexistence of two different and competing order parameters in Bi2212. Experimental data indicate that the SG can form a combined (large) gap with the PG at T<T-c and that the interlayer tunneling becomes progressively incoherent with decreasing doping.

引用

页码：1 / 4

页数：4

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