Characteristic relationship between the maximum Josephson current and the c-axis conductivity observed for intrinsic Josephson junctions in Bi-Sr-Ca-Cu-O

Author

Suzuki, Minoru ; Hamatani, Takashi ; Yamada, Yoshiharu ; Anagawa, Kenkichi ; Watanabe, Takao

Author_Institution

Dept. of Electron. Sci. & Eng., Kyoto Univ., Japan

Volume

15

Issue

2

fYear

2005

fDate

6/1/2005 12:00:00 AM

Firstpage

189

Lastpage

192

Abstract

The maximum Josephson current (MJC) is measured for small mesas fabricated on cleaved surfaces of Bi₂Sr₂CaCu₂O_8+δ single crystals. It is found that the MJC increases dramatically with increasing c-axis conductivity. The behavior indicates that the MJC is proportional to the square of the c-axis conductivity. This implies that the superconductivity in high-T_c superconductors is likely to be inhomogeneous.

Keywords

bismuth compounds; calcium compounds; critical currents; electrical conductivity; high-temperature superconductors; strontium compounds; superconducting junction devices; tunnelling spectroscopy; Bi2212; Bi₂Sr₂CaCu₂O₈; Josephson current; c-axis conductivity; high temperature superconductors; intrinsic Josephson junctions; mesa; superconductivity; Conductivity; Crystals; Degradation; Educational technology; High temperature superconductors; Josephson effect; Josephson junctions; Spectroscopy; Superconductivity; Tunneling; Bi-Sr-Ca-Cu-O; Josephson junctions; high-temperature superconductors; tunneling spectroscopy;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2005.849747

Filename

1439608