ISSN:
1572-9605
Keywords:
Josephson coupling
;
layered superconductor
;
inter-layer coupling
Source:
Springer Online Journal Archives 1860-2000
Topics:
Electrical Engineering, Measurement and Control Technology
,
Physics
Notes:
Abstract The dc current-voltage (I-V) relation along the c-axis of single crystalline Bi2Sr2CaCu2O8+δ has been measured in magnetic fields parallel and perpendicular to the c-axis. In zero field a clear and sharp jump with large hysteresis in theI-V curve was observed, indicative of the dc-Josephson effect. In magnetic field below a characteristic fieldB *≈0.4 T (at T=0 K) parallel to the c-axis the magnetic field suppresses the hysteresis and reduces the critical currentI c drastically, whereas aboveB * theI-V curve becomes broad and featureless behavior. The characteristic field scaleB * can be interpreted as an energy scale of the Josephson coupling between superconducting layers in Bi2Sr2CaCu2O8+δ and is argued with emphasis on the correlation length of pancake vortices in this system.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00722830
