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Title: The influence of la substitution and oxygen reduction in ambipolar La-doped YBa2Cu3Oy thin films
Authors: Zeng, S.W.
Huang, Z.
Wang, X.
Lü, W.M.
Liu, Z.Q.
Zhang, B.M.
Dhar, S. 
Venkatesan, T. 
Issue Date: Dec-2012
Citation: Zeng, S.W., Huang, Z., Wang, X., Lü, W.M., Liu, Z.Q., Zhang, B.M., Dhar, S., Venkatesan, T., Ariando (2012-12). The influence of la substitution and oxygen reduction in ambipolar La-doped YBa2Cu3Oy thin films. Superconductor Science and Technology 25 (12) : -. ScholarBank@NUS Repository.
Abstract: We report hole and electron doping in Y0.38La 0.62(Ba2-xLax)Cu3Oy thin films synthesized by the pulsed laser deposition technique and subsequently annealed in oxygen ambient or in a vacuum. X-ray diffraction studies suggested a single phase in p-type thin films and transport measurements showed a superconductor-to-insulator transition at x = 0.46. Hall measurements indicated electrons were successfully doped when the thin films were annealed in vacuum. The n-type samples demonstrated metallic behaviour within moderate temperature ranges, and a low in-plane resistivity (ρab) and a high carrier density for 0.32 ≤ x ≤ 0.46. The increase in ρab for higher La doping levels, probably caused by charge compensation, is also discussed. The present result could be a significant step in searching for electron-doped superconductivity in the YBa2Cu3Oy system. © 2012 IOP Publishing Ltd.
Source Title: Superconductor Science and Technology
ISSN: 09532048
DOI: 10.1088/0953-2048/25/12/124003
Appears in Collections:Staff Publications

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