Manifestation of features of the density of states of a high-Tc superconductor on the current-voltage characteristics of Bi-Sr-Ca-Cu-O:Pb tunnel structures
Akhatov Kh., Shukrinov Yu. M., Menakov N., Leonyuk L. I.
The current-voltage characteristics and dl{ V)/dV characteristics of tunnel break junctions in single-crystal Bi-Sr-Ca-Cu-O-.Pb samples (the 2212 phase) have been studied at a temperature of 4.2 K. The I-V curve has regions with a negative resistance at bias voltages V in the intervals 2-4 mV and 38-40 mV. These regions are linked with features in the density of states which stem from the layered structure of this high-rc superconductor.