Title: Anisotropic photoexcited carrier dynamics in (100)-, (001)-, and (110)-oriented YBCO films by polarized ultrafast optical spectroscopy
Authors: Luo, CW
Chen, MH
Chiu, CC
Chen, SP
Wu, KH
Lin, JY
Juang, JY
Uen, TM
Gou, YS
Department of Electrophysics
Institute of Physics
Issue Date: 1-Jun-2003
Abstract: We report the time-resolved ultrafast optical spectroscopy results obtained from a series of well characterized (001)-, (100)- and (110)-oriented YBa2Cu3O7-delta (YBCO) superconducting films prepared by pulsed laser deposition. The well-controlled film orientation has allowed us to probe the relaxation dynamics along various crystal orientations using respectively polarized pump and probe laser beams. The significant anisotropies in both the magnitude of the characteristic relaxation time and the temperature dependence of the photo-induced transient reflectance change indicate the nature of relaxation channel might be intrinsically different along different orientations. The implications of the results on the fundamental characteristics concerning superconducting gaps are discussed.
URI: http://dx.doi.org/10.1023/A:1023410522965
ISSN: 0022-2291
DOI: 10.1023/A:1023410522965
Volume: 131
Issue: 5-6
Begin Page: 767
End Page: 774
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