Doping dependence of the ultrafast electronic dynamics of Y1−xPrxBa2Cu3O7−δ thin-film superconductors from femtosecond optical spectroscopy
C. W. Luo, H. P. Lo, C. H. Su, I. H. Wu, Y.-J. Chen, K. H. Wu, J.-Y. Lin, T. M. Uen, J. Y. Juang, T. Kobayashi
DOI 10.1103/PhysRevB.82.104512 · Physical Review B
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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−xPrxBa2Cu3O7−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.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 89.6 | Pressure not reported | unknown |
| Y0.9Pr0.1Ba2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 80.5 | Pressure not reported | unknown |
| Y0.8Pr0.2Ba2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 66.5 | Pressure not reported | unknown |
| Y0.6Pr0.4Ba2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 39.4 | Pressure not reported | unknown |
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