Ultrafast dynamics in oxygen-deficient Y0.7Ca 0.3Ba2Cu3O7-δ superconductors

Chih-Wei Luo, T. C. Huang, Kaung-Hsiung Wu, Jenh-Yih Juang, Jiunn-Yuan Lin, T. M. Uen, T. Kobayashi

Research output: Contribution to journalArticlepeer-review


The transient reflectivity change (ΔR/R) in oxygen-deficient Y 0.7Ca0.3Ba2Cu3O7-δ (YCaBCO) thin films have been systematically measured at various temperatures by femtosecond spectroscopy. The magnitude change of ΔR/R from normal state to superconducting state were clearly observed in YCaBCO with various oxygen deficient, e.g. from overdoped region over optimaldoped region to underdoped region. Additionally, the carrier-phonon coupling strength was also characterized by the relaxation time of ΔR/R at various temperatures and hole concentration.

Original languageEnglish
Article number052144
Pages (from-to)1-4
Number of pages4
JournalJournal of Physics: Conference Series
Issue number5
StatePublished - 6 Aug 2009


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