The superconducting transition temperature (Tc), the junction resistance (RN) and the critical current density along the c-axis (Jc) of Bi-2212 whiskers with different oxygen content have been measured. Tc showed a systematical change for the c-axis length. Since the change of c-axis length corresponds to the change of oxygen content, it can be considered that this behavior explains the clear change in carrier density on the whisker from overdoped to underdoped region. Jc of intrinsic Josephson junctions fabricated on the whisker exponentially decreases with decreasing the carrier density on whiskers. It indicates that the transport along the c-axis is due to a tunneling process through an insulating barrier.
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Energy Engineering and Power Technology
- Electrical and Electronic Engineering