Edge-like planar sandwich-type junctions using a-axis oriented YBa2Cu3O7-x/insulator/YBa2Cu3O7-x trilayers

摘要

We have fabricated the in-plane aligned a-axis oriented YBa2 Cu3O7-x/LaSrGaO4/YBa2 Cu3O7-x (YBCO/LSGO/YBCO) heteroepitaxial trilayers on LSGO (100) substrates. A LSGO insulating barrier and top YBCO layer were grown on the ion-beam etched in-plane aligned, a-axis oriented YBCO bottom layer. Superconductor-insulator-superconductor edge-like planar sandwich-type junctions using these a-axis oriented YBCO/LSGO/YBCO trilayers had a superconducting transition temperature of 84 K and revealed flux-flow type I-V characteristics