Impurity-Related Local Density-of-States Modulation in Bi2Sr2Ca(Cu1-xZnx)2O8+δ Probed by Scanning Tunneling Spectroscopy

被引：0

作者：

Machida, Tadashi ^{[1
]}

Kato, Takuya ^{[2
]}

Nakamura, Hiroshi ^{[2
]}

Fujimoto, Masaki ^{[2
]}

Mochiku, Takashi ^{[1
]}

Ooi, Shuuichi ^{[1
]}

Sakata, Hideaki ^{[2
]}

Hirata, Kazuto ^{[1
]}

机构：

[1] Natl Inst Mat Sci, Superconducting Mat Ctr, Tsukuba, Ibaraki 3050047, Japan

[2] Tokyo Univ Sci, Dept Phys, Shinjuku Ku, Tokyo 1628601, Japan

来源：

JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM | 2011年 / 24卷 / 1-2期

关键词：

Impurity; Cuprate; Scanning tunneling microscope; D-WAVE SUPERCONDUCTOR; BI2SR2CACU2O8+DELTA; INTERPLAY; ATOMS;

D O I：

10.1007/s10948-010-0976-5

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We have performed scanning tunneling spectroscopy on a single crystal of Bi2Sr2Ca(Cu1-x Zn (x) )(2)O8+delta (x=0.005) and found several regions where at least two Zinc (Zn) impurities aggregate within a few nm. In these regions, there are two-dimensional local density-of-states (LDOS) modulations with the period of about 1.41a (0) (a (0) is Cu-O-Cu distance) along the direction tilted 45 degrees from Cu-O-Cu direction within the energy of below 10 mV. Since these modulations are suppressed in a map of the ratio between LDOS at a positive energy and at its negative, it is presumable that these modulations do not stem from the simple quasiparticle interference whose pattern should be enhanced in the ratio map. We suggest the possible explanations with respect to the origin of the observed modulations.

引用

页码：481 / 484

页数：4

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