Large pseudogap and nodal superconducting gap in Bi2Sr2-xLaxCuO6+δ and Bi2Sr2CaCu2O8+δ: Scanning tunneling microscopy and spectroscopy

被引：41

作者：

Kurosawa, T. ^{[1
]}

Yoneyama, T. ^{[1
]}

Takano, Y. ^{[1
]}

Hagiwara, M. ^{[1
]}

Inoue, R. ^{[1
]}

Hagiwara, N. ^{[1
]}

Kurusu, K. ^{[1
]}

Takeyama, K. ^{[1
]}

Momono, N. ^{[2
]}

Oda, M. ^{[1
]}

Ido, M. ^{[1
]}

机构：

[1] Hokkaido Univ, Dept Phys, Sapporo, Hokkaido 0600810, Japan

[2] Muroran Inst Technol, Dept Mat Sci & Engn, Muroran, Hokkaido 0508585, Japan

来源：

PHYSICAL REVIEW B | 2010年 / 81卷 / 09期

关键词：

UNDERDOPED BI2SR2CACU2O8+DELTA; CONDENSATION ENERGY; STATE; SCALE; LA2-XSRXCUO4; DEPENDENCE; BI2212;

D O I：

10.1103/PhysRevB.81.094519

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In the present work, scanning tunneling microscopy/spectroscopy (STM/STS) measurements were carried out on underdoped Bi2Sr2-xLaxCuO6+delta and Bi2Sr2CaCu2O8+delta to clarify the origin of the pseudogap, in particular, the inhomogeneous large pseudogap. The nodal part of a d-wave pairing gap, which is under no influence of the inhomogeneous large pseudogap, was also examined by relating the homogeneous bottom part of the STS gap to a nodal d-wave gap in momentum space. We report that the inhomogeneous large pseudogap in the antinodal region links to a two-dimensional electronic charge order, and that the gap size of the nodal d-wave part Delta(sc) scales with the superconducting critical temperature T-c in the pseudogap regime.

引用

页数：7

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