標題: | Effect of Mn impurities on the superconductivity in NaxCoO2 center dot yH(2)O |
作者: | Chen, Y.-J. Liu, C.-J. 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. 電子物理學系 物理研究所 Department of Electrophysics Institute of Physics |
公開日期: | 1-九月-2007 |
摘要: | To shed light on the symmetry of the superconducting order parameter in NaxCoO2 center dot yH(2)O, 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 T-c suppression. This absence of the strong impurity effects on T-c 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. |
URI: | http://dx.doi.org/10.1103/PhysRevB.76.092501 http://hdl.handle.net/11536/10350 |
ISSN: | 1098-0121 |
DOI: | 10.1103/PhysRevB.76.092501 |
期刊: | PHYSICAL REVIEW B |
Volume: | 76 |
Issue: | 9 |
起始頁: | 0 |
結束頁: | 0 |
顯示於類別: | 期刊論文 |