caa a22 4500 445380772 CHVBK 20180317143016.0 cr unu---uuuuu 170323e20110101xx s 000 0 eng 10.1007/s10948-010-0918-2 doi (NATIONALLICENCE)springer-10.1007/s10948-010-0918-2 Electron-Boson Coupling Constant of Oxygen-Deficient Y0.7Ca0.3Ba2Cu3O7− δ Measured by Ultrafast Spectroscopy [Elektronische Daten] [C. Luo, J.-Y. Chen, T. Huang, K. Wu, J.-Y. Lin, J. Juang, T. Uen] The ultrafast dynamics in an (001) oxygen-deficient Y0.7Ca0.3Ba2Cu3O7−δ thin film were measured by using the ultrafast spectroscopy. According to the model of time-dependent distributions of electrons in the case of electron-phonon relaxation, the electron-boson coupling constant λ could be directly obtained from the relaxation time of the transient reflectivity change (ΔR/R). For the overdoped case with T c=61.3K and the underdoped case with T c=65.5K, the relaxation time of ΔR/R is around 4.32 ps and 3.66 ps, respectively, which correspond to λ∼0.06. However, the λ become larger (∼0.15) in the optimal doped region with T c=82.1K while the relaxation time of ΔR/R shrinks to ∼1.51 ps. These results indicate that the λ is strongly hole-doping dependent, which may govern the T c of cuprate superconductors. Springer Science+Business Media, LLC, 2010 Cuprate superconductors nationallicence Electron-boson coupling constant nationallicence Ultrafast spectroscopy nationallicence Luo C. Department of Electrophysics, National Chiao Tung University, Hsinchu, Taiwan, ROC aut Chen J.-Y Department of Electrophysics, National Chiao Tung University, Hsinchu, Taiwan, ROC aut Huang T. Department of Electrophysics, National Chiao Tung University, Hsinchu, Taiwan, ROC aut Wu K. Department of Electrophysics, National Chiao Tung University, Hsinchu, Taiwan, ROC aut Lin J.-Y Institute of Physics, National Chiao Tung University, Hsinchu, Taiwan, ROC aut Juang J. Department of Electrophysics, National Chiao Tung University, Hsinchu, Taiwan, ROC aut Uen T. Department of Electrophysics, National Chiao Tung University, Hsinchu, Taiwan, ROC aut Journal of Superconductivity and Novel Magnetism Springer US; http://www.springer-ny.com 24/1-2(2011-01-01), 189-191 1557-1939 24:1-2<189 2011 24 10948 https://doi.org/10.1007/s10948-010-0918-2 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10948-010-0918-2 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Luo C. Department of Electrophysics, National Chiao Tung University, Hsinchu, Taiwan, ROC aut NATIONALLICENCE 700 1- Chen J.-Y Department of Electrophysics, National Chiao Tung University, Hsinchu, Taiwan, ROC aut NATIONALLICENCE 700 1- Huang T. Department of Electrophysics, National Chiao Tung University, Hsinchu, Taiwan, ROC aut NATIONALLICENCE 700 1- Wu K. Department of Electrophysics, National Chiao Tung University, Hsinchu, Taiwan, ROC aut NATIONALLICENCE 700 1- Lin J.-Y Institute of Physics, National Chiao Tung University, Hsinchu, Taiwan, ROC aut NATIONALLICENCE 700 1- Juang J. Department of Electrophysics, National Chiao Tung University, Hsinchu, Taiwan, ROC aut NATIONALLICENCE 700 1- Uen T. Department of Electrophysics, National Chiao Tung University, Hsinchu, Taiwan, ROC aut NATIONALLICENCE 773 0- Journal of Superconductivity and Novel Magnetism Springer US; http://www.springer-ny.com 24/1-2(2011-01-01), 189-191 1557-1939 24:1-2<189 2011 24 10948 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer