Distribution of the Impurity Resonance Energy in Bi2Sr2CaCu2O8+δ Observed by Scanning Tunneling Spectroscopy

被引：0
|
作者：
H. Nakamura
T. Machida
M. Iguchi
T. Yamasaki
A. Kaneko
H. Kariya
D. Morohoshi
S. Ooi
T. Mochiku
K. Hirata
T. Hasegawa
H. Sakata
机构：
[1] Tokyo University of Science,Department of Physics
[2] National Institute for Materials Science,Superconducting Materials Center
[3] University of Tokyo,Department of Chemistry
来源：
Journal of Superconductivity and Novel Magnetism | 2013年 / 26卷
关键词：
Bi based superconductor; Impurity effect; Scanning tunneling microscopy and spectroscopy;
D O I：
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学科分类号：
摘要：
Using scanning tunneling microscopy and spectroscopy (STM/STS) at 4.2 K, we observed Zn impurity resonance states in single crystals of Zn substituted Bi2Sr2Ca(Cu1−xZnx)2O8+δ. Zn impurity resonances were characterized by the peak structure in the local density of states (LDOS). The peaks were appeared near the EF on each of Zn impurity sites. The peak energy showed a wide distribution from −7 to 5 meV. The average peak energy was −1.5 meV and the variance was 1.8 meV. We investigated the correlation between the peak energy at a Zn site and the energy gap value in the region where the Zn site is embedded. Although we observed about hundred Zn sites, no correlation between the local energy gap and the peak energy was observed.
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页码：2633 / 2635
页数：2
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