Quasi-particle injection into YBa2Cu3O7-δ micro-bridge

Abstract

Several types of quasi-particle injections into YBa2Cu3O7−δ (YBCO) micro-bridge have been studied, revealing the quasi-particle non-equilibrium effect, the current superposition effect and the heating effect. The current gain’s dependence on temperatures indicates that superconductivity of YBCO is really suppressed by quasi-particle injection. We propose a new type of quasi-particle injection which turns out to be a promising candidate for interface between superconductor and semiconductor circuits.