標題: Anisotropic Ultrafast Dynamics of Quasiparticles on CuO2 Planes of Y0.7Ca0.3Ba2Cu3O7-delta
作者: Luo, C. W.
Huang, T. C.
Chiang, M. T.
Wu, K. H.
Juang, J. Y.
Lin, J. -Y.
Uen, T. M.
電子物理學系
物理研究所
Department of Electrophysics
Institute of Physics
關鍵字: Cuprate superconductors;Anisotropic ultrafast dynamics;Superconducting gap symmetry
公開日期: 1-七月-2010
摘要: The orientation-resolved femtosecond spectroscopy, combined with the well-textured (110)- and (001)Y0.7Ca0.3Ba2Cu3O7-delta thin films, serves as an effective probe to quasiparticle relaxation dynamics on the ab planes and along the diagonal orientations. The significant divergences in the temperature-dependent relaxation time (tau) associated with the opening of superconducting gap were observed along the nodal directions and on the CuO2 planes which are dominated by the a axis and b axis in the over-doped region. Moreover, the divergence in the temperature-dependent served along the nodal direction disappears around optimal doped region. This implies that the superconducting gap evolves from the dominant s-wave symmetry in over-doped region into the dominant d-wave symmetry in optimal doped region.
URI: http://dx.doi.org/10.1007/s10948-010-0683-2
http://hdl.handle.net/11536/149963
ISSN: 1557-1939
DOI: 10.1007/s10948-010-0683-2
期刊: JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM
Volume: 23
起始頁: 781
結束頁: 784
顯示於類別:期刊論文