National Changhua University of Education Institutional Repository : Item 987654321/14219
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题名: Effect of Mn Impurities on the Superconductivity in NaxCoO2 �yH2O
作者: Chen, Y. J.;Liu, Chia-Jyi;Wang, J. S.;Lin, J. Y.;Sun, C. P.;Huang, S. W.;Lee, J. M.;Chen, J. M.;Lee, J. F.;Liu, D. G.;Yang, H. D.
贡献者: 物理學系
日期: 2007
上传时间: 2012-09-10T06:15:02Z
出版者: The American Physical Society
摘要: To shed light on the symmetry of the superconducting order parameter in NaxCoO2∙yH2O, the Mn doping effects are studied. X-ray absorption spectroscopy verifies that the doped Mn impurities occupy the Co sites and are with a valance close to +4. Impurity scattering by Mn is in the unitary limit that, however, does not lead to strong Tc suppression. This absence of the strong impurity effects on Tc is inconsistent with the simple picture of a sign-changing order parameter. Coexistence of the s-wave superconducting order parameter and the nodal one is proposed to reconcile all the existing experiments and has been implied by the specific heat experiments.
關聯: Phys. Rev. B, 76(9): 092501
显示于类别:[物理學系] 期刊論文

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