caa a22 4500 445380837 CHVBK 20180317143016.0 cr unu---uuuuu 170323e20110101xx s 000 0 eng 10.1007/s10948-010-0983-6 doi (NATIONALLICENCE)springer-10.1007/s10948-010-0983-6 Doping-Dependent Phase Diagram of Ca-Doped YBCO Observed by Femtosecond Spectroscopy [Elektronische Daten] [Y.-J. Chen, K. Wu, C. Luo, J.-Y. Lin, J. Juang, T. Uen] The quasiparticle relaxation dynamics in a single (001) Ca-doped YBCO (Y0.7Ca0.3Ba2Cu3O7−δ ) superconducting thin film was probed by using the femtosecond time-resolved spectroscopy. The (001) Y0.7Ca0.3Ba2Cu3O7−δ thin film was prepared on a (100)STO substrate by pulsed laser deposition. Through controlling the oxygen pressure and the annealing temperature within quartz tube, the doping level (0.08<p<0.22) in the phase diagram could be widely tuned from the overdoped region to the underdoped region with varying the hole concentration(p) in a single sample. In the overdoped region, two different components (positive/negative) were obviously identified in the transient reflectivity curves (ΔR/R). The negative component in ΔR/R emerges at T<T c and quickly defeated by the development of the positive component. The dramatic change in the positive component of ΔR/R arises well below T c. However, this anomaly change does not appear in the underdoped region. Only the positive ΔR/R was clearly observed at whole temperatures. These results indicate that the scenario of high-T c superconductivity in the overdoped region would be different from the underdoped region. Springer Science+Business Media, LLC, 2010 Cuprate superconductors nationallicence Ultrafast spectroscopy nationallicence Nernst effect nationallicence Chen Y.-J Department of Electrophysics, National Chiao Tung University, Hsinchu, Taiwan, ROC aut Wu K. Department of Electrophysics, National Chiao Tung University, Hsinchu, Taiwan, ROC aut Luo C. 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), 515-517 1557-1939 24:1-2<515 2011 24 10948 https://doi.org/10.1007/s10948-010-0983-6 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10948-010-0983-6 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Chen Y.-J 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- Luo C. 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), 515-517 1557-1939 24:1-2<515 2011 24 10948 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer