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|Title:||The influence of la substitution and oxygen reduction in ambipolar La-doped YBa2Cu3Oy thin films|
|Source:||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. https://doi.org/12/124003|
|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|
|Appears in Collections:||Staff Publications|
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