| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Fantastic Behaviour of High-TC Superconductor Junctions: Tunable Superconductivity |
| CHEN Yuan-Sha, ZHANG Yan, LIAN Gui-Jun, XIONG Guang-Cheng |
| Department of Physics, Peking University, Beijing 100871 |
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| Cite this article: |
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CHEN Yuan-Sha, ZHANG Yan, LIAN Gui-Jun et al 2009 Chin. Phys. Lett. 26 017305 |
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Abstract Carrier injection performed in oxygen-deficient YBa2Cu3O7-δ (YBCO) hetero-structure junctions exhibits tunable resistance that is entirely different from the behaviour of semiconductor devices. Tunable superconductivity in YBCO junctions, increasing over 20K in transition temperature, has achieved by using electric processes. To our knowledge, this is the first observation that intrinsic property of high TC 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.
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| Keywords:
73.61.-r
74.62.Yb
74.72.Bk
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Received: 18 July 2008
Published: 24 December 2008
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