DocumentCode
41901
Title
Tunneling Spectroscopy of the Superconductor-Insulator Transition on 
and
Author
Qing Tao Meng ; Komaki, Shozo ; Tsuneoka, Takuya ; Hanada, Hirotoshi ; Maeda, Shigenobu ; Murano, Taiki ; Ichikawa, Fusao ; Itoh, Kenji ; Nishisako, Yuya ; Shigeta, Iduru ; Hiroi, Masahiko
Author_Institution
Dept. of Phys., Kumamoto Univ., Kumamoto, Japan
Volume
24
Issue
5
fYear
2014
fDate
Oct. 2014
Firstpage
1
Lastpage
4
Abstract
We report tunnel experiments on Bi2Sr2Ca1-xYxCu2O8+δ (Y-Bi2212) crystals with x=0, 0.01, 0.05, 0.1, 0.11, and 0.12. The results are discussed about Cooper pairs existing. Tunneling spectra were measured for Y-Bi2212 crystal-SiO-Ag planar junctions. For superconducting samples the V-shaped gap structure and zero bias conductance peaks (ZBCP) were observed. While neither superconducting gap nor ZBCP was observed for insulator samples. These results suggest that Cooper pairs break up on the insulating side of superconductor-insulator transition (SIT). We also measured tunneling spectra on (Bi1-yPby)2Sr2Ca1-xYxCu2O8+δ samples. In their spectra there were also several characteristic behaviors.
Keywords
Cooper pairs; bismuth compounds; calcium compounds; electric admittance; high-temperature superconductors; lead compounds; silicon compounds; silver; strontium compounds; superconducting transitions; superconductive tunnelling; tunnelling spectra; yttrium compounds; (Bi1-yPby)2Sr2Ca1-xYxCu2O8+δ-SiO-Ag; Bi2Sr2Ca1-xYxCu2O8+δ-SiO-Ag; Cooper pairs; V-shaped gap structure; Y-Bi2212 crystal-SiO-Ag planar junctions; superconductor-insulator transition; tunneling spectra; tunneling spectroscopy; zero bias conductance peaks; Crystals; Josephson junctions; Nonhomogeneous media; Spectroscopy; Superconducting transition temperature; Temperature measurement; Tunneling; Bi2212; ZBCP; superconductivity; transition; tunnel;
fLanguage
English
Journal_Title
Applied Superconductivity, IEEE Transactions on
Publisher
ieee
ISSN
1051-8223
Type
jour
DOI
10.1109/TASC.2014.2351263
Filename
6882203
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