Appearance of new energy gap and periodic local density-of-states modulation in Bi2Sr1.6La0.4CuO6+S

被引：41

作者：

Machida, Tadashi ^{[1
]}

Kamijo, Yusuke ^{[1
]}

Harada, Keiji ^{[1
]}

Noguchi, Tetsurou ^{[1
]}

Saito, Ryo ^{[1
]}

Kato, Takuya ^{[1
]}

Sakata, Hideaki ^{[1
]}

机构：

[1] Tokyo Univ Sci, Dept Phys, Shinjyuku Ku, Tokyo 1628601, Japan

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 2006年 / 75卷 / 08期

关键词：

STM; STS; cuprate; Bi2Sr1.6La0.4CuO6+delta; local density-of-states modulation;

D O I：

10.1143/JPSJ.75.083708

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The spatial variation of the local density of states in optimally doped Bi2Sr1.6La0.4CuO6+delta (superconducting transition temperature is 34K) is studied by scanning tunneling spectroscopy at 4.2 K in zero magnetic field. Two-dimensional density-of-states modulation aligned with the Cu-O-Cu bond with a periodicity of about five lattice constants is observed. It is found that this modulation accompanies the appearance of a new energy gap of approximately 10meV, whose gap edge peak is spatially modulated in intensity. This gap coexists with the superconducting gap, the value of which ranges from 10meV to 60meV.

引用

页数：4

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