Quasiparticle-injection effect in YBa2Cu3Ox-based planar structures

✍ Scribed by Yu.M. Boguslavskij; K. Joosse; F.J.G. Roesthuis; G.J. Gerritsma; H. Rogalla

• Publisher: Elsevier Science
• Year: 1994
• Tongue: English
• Weight: 209 KB
• Volume: 194-196
• Category: Article
• ISSN: 0921-4526
• DOI: 10.1016/0921-4526(94)90372-7

✦ Synopsis

The supereurrent I s of a YBCO bridge can be modulated by the quasipartiele-injection current I a from YBCO/Au or YBCO/PBCO/Aujunctions. The behavior of these structures is determined by two effects: 1) summation of the currents I s and I o in the YBCO bridge; 2) nonequilibrium suppression of the supercurrent I s by the quasiparticle-injection. The current gain coefficient &Is/AI o increases linearly with decreasing temperature, reaching a value of 1.5 for YBCO/Au structures at 65 K. The nature of the nonequilibrium state and the effectiveness of the PBCO barrier layer for the formation of the quasiparticles are analyzed.