Journal ArticleDOI
The influence of La substitution and oxygen reduction in ambipolar La-doped YBa 2 Cu 3 O y thin films
Shengwei Zeng,Zhiwei Huang,X.P. Wang,W. M. Lü,Zhiqi Liu,Bangmin Zhang,Sankar Dhar,Thirumalai Venkatesan,Ariando +8 more
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In this paper, hole and electron doping in Y0.38La0.62(Ba2−xLax)Cu3Oy thin films synthesized by the pulsed laser deposition technique and subsequently annealed in oxygen ambient or in a vacuum.Abstract:
We report hole and electron doping in Y0.38La0.62(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.read more
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Evidence for a Quantum Phase Transition in Pr2xCexCuO4 from Transport Measurements
TL;DR: In this article, a study of some of these physical properties in the electron-doped cuprates, with the doping level being the control parameter, is the focus of the research presented in this Letter.
References
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TL;DR: The goal is to combine kinetic and kinematic data to examine translational motions during microgravity adaptations to encourage fine-control motions as these reduce the risk of injury and increase controllability.
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A superconducting copper oxide compound with electrons as the charge carriers
TL;DR: In this paper, a family of superconducting copper oxides in which the carriers are electrons was discovered, with the formula Ln2−xCexCuO4−y, where Ln stands for lanthanides Pr, Nd or Sm.
Journal ArticleDOI
Structural properties of oxygen-deficient YBa2Cu3O7- delta.
James D. Jorgensen,B. W. Veal,Arvydas P. Paulikas,L.J. Nowicki,G. W. Crabtree,Helmut Claus,W. K. Kwok +6 more
TL;DR: In this paper, the structural properties of oxygen-deficient (YBa) and copper-oxygen bond lengths have been determined by neutron powder diffraction for 0.07l and 0.91l, respectively.
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Structural anomalies, oxygen ordering and superconductivity in oxygen deficient Ba2YCu3Ox
Robert J. Cava,A.W. Hewat,Elizabeth A. Hewat,Bertram Batlogg,M. Marezio,M. Marezio,Karin M. Rabe,J. J. Krajewski,W. F. Peck,L. W. Rupp +9 more
TL;DR: In this article, the authors report the characterization of series of oxygen deficient Ba2YCu3Ox samples for 7 ≥ x ≥ 6 prepared by Zr gettered annealing at 440°C.
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Superconductivity above 90 K in the square-planar compound system ABa2Cu3O6+x with A=Y, La, Nd, Sm, Eu, Gd, Ho, Er and Lu.
Pei-Herng Hor,R. L. Meng,Yongmei Wang,Li Gao,Z. J. Huang,J. Bechtold,K. Forster,Ching-Wu Chu +7 more
TL;DR: The results suggest that the unique square planar Cu atoms, each surrounded by four or six oxygen atoms, are crucial to the superconductivity of oxides in general.