Doping dependence of the ultrafast electronic dynamics of Y1-x Prx Ba2 Cu3 O7-δ thin-film superconductors from femtosecond optical spectroscopy

Chih-Wei Luo, H. P. Lo, C. H. Su, I. H. Wu, Y. J. Chen, Kaung-Hsiung Wu, Jiunn-Yuan Lin, T. M. Uen, Jenh-Yih Juang, T. Kobayashi

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Abstract

Time-domain spectroscopy, which probes the dynamics of the electronic states near Fermi surface that are associated with superconductivity, has proven to be a powerful method for providing insights into the fundamental nature of both pseudogap and superconducting gap. This study shows that the unique T-x phase diagram with the time-evolving ultrafast dynamics of Y1-x Prx Ba2 Cu3 O7-δ can be used to identify clearly the Nernst, pseudogap, and superconducting regions. All of the orders appear together at a specific delay time, such as 1.2-3 ps, after pumping by an ultrashort pulse. These discoveries suggest that the Nernst effect, the pseudogap and even superconductivity may have the same physical origin.

Original languageEnglish
Article number104512
Pages (from-to)1-5
Number of pages5
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume82
Issue number10
DOIs
StatePublished - 17 Sep 2010

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