Fantastic Behaviour of High-T-c Superconductor Junctions: Tunable Superconductivity

Carrier injection performed in oxygen-deficient YBa2Cu3O7-delta. (YBCO) hetero-structure junctions exhibits tunable resistance that is entirely different from the behaviour of semiconductor devices. Tunable superconductivity in YBCO junctions, increasing over 20 K in transition temperature, has achieved by using electric processes. To our knowledge, this is the first observation that intrinsic property of high T-c. superconductors' superconductivity can be adjusted as tunable functional parameters of devices. The fantastic phenomenon caused by carrier injection is discussed based on a proposed charge carrier self-trapping model and BCS theory.Physics, MultidisciplinarySCI(E)中国科技核心期刊(ISTIC)3ARTICLE1null2