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
Link To Document :
