標題: | Observation of vortex-like excitations in Pr-doped YBCO thin films from femtosecond spectroscopy |
作者: | Luo, C. W. 電子物理學系 Department of Electrophysics |
關鍵字: | Ultrafast dynamics;Pr-doped YBCO;Nernst signal |
公開日期: | 1-十二月-2010 |
摘要: | The ultrafast dynamics of photoinduced quasiparticles in the (001) Pr-doped YBCO (Y(1-x)Pr(x)Ba(2) Cu(3)O(7-delta), x = 0.1 and 0.2) thin films is revealed by using the femtosecond spectroscopy. Above the zero resistance transition temperature (T(c)), the anomalous rise in the amplitude of the transient reflectivity curves (Delta R/R) were clearly observed. The temperature (T(N)) corresponded to the negative peak in temperature-dependent Delta R/R is well associated with the onset temperature of the anomalous Nernst signal. These ultrafast responses are attributed to vortex-like excitations in the phase incoherent condensate existing above T(c). (C) 2009 Elsevier B.V. All rights reserved. |
URI: | http://dx.doi.org/10.1016/j.physc.2009.11.026 http://hdl.handle.net/11536/4685 |
ISSN: | 0921-4534 |
DOI: | 10.1016/j.physc.2009.11.026 |
期刊: | PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS |
Volume: | 470 |
Issue: | |
起始頁: | S176 |
結束頁: | S177 |
顯示於類別: | 會議論文 |