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10 August 1994 Reversible modulation of superconductivity in YBa2Cu3O7-δ/polypyrrole sandwich structures
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Abstract
The preparation of a hybrid conducting polymer/high-temperature superconductor device consisting of a polypyrrole coated YBa2Cu3O7-(delta ) microbridge is reported. Electrochemical techniques are exploited to alter the oxidation state of the polymer and, in doing so, it is found that superconductivity can be modulated in a controllable and reproducible fashion by the polymer layer. Whereas the neutral (insulating) polypyrrole only slightly influences the electrical properties of the underlying YBa2Cu3O7-(delta ) film, the oxidized (conductive) polymer depresses Tc by up to 50 K. The observed reversible shifts in Tc are the largest reported to date. In a similar fashion, the oxidation state of the polymer is found to reversibly modulate the magnitude of Jc, the superconducting critical current. Thus, the operation of a molecular/superconductor switch for controlling superconductivity is demonstrated.
© (1994) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Steven G. Haupt, David R. Riley, Jianai Zhao, Ji-Ping Zhou, James H. Grassi, and John Thomas McDevitt "Reversible modulation of superconductivity in YBa2Cu3O7-δ/polypyrrole sandwich structures", Proc. SPIE 2158, Oxide Superconductor Physics and Nano-Engineering, (10 August 1994); https://doi.org/10.1117/12.182687
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