Title :
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
fDate :
6/1/2005 12:00:00 AM
Abstract :
The maximum Josephson current (MJC) is measured for small mesas fabricated on cleaved surfaces of Bi2Sr2CaCu2O8+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-Tc 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;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2005.849747
