Influence of optically quenched superconductivity on quasiparticle relaxation rates in Bi2Sr2CaCu2 O8+δ

Christopher L. Smallwood, Wentao Zhang, Tristan L. Miller, Gregory Affeldt, Koshi Kurashima, Chris Jozwiak, Takashi Noji, Yoji Koike, Hiroshi Eisaki, Dung Hai Lee, Robert A. Kaindl, Alessandra Lanzara

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Abstract

We use time- and angle-resolved photoemission to measure quasiparticle relaxation dynamics across a laser-induced superconducting phase transition in Bi2Sr2CaCu2O8+δ. Whereas low-fluence measurements reveal picosecond dynamics, sharp femtosecond dynamics emerge at higher fluence. Analyses of data as a function of energy, momentum, and doping indicate that the closure of the near-nodal gap and disruption of macroscopic coherence are primary mechanisms driving this onset. The results demonstrate the important influence of transient electronic structure on relaxation dynamics, which is relevant for developing an understanding of nonequilibrium phase transitions.

Original languageEnglish
Article number161102
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume92
Issue number16
DOIs
Publication statusPublished - 2015 Oct 6

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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    Smallwood, C. L., Zhang, W., Miller, T. L., Affeldt, G., Kurashima, K., Jozwiak, C., Noji, T., Koike, Y., Eisaki, H., Lee, D. H., Kaindl, R. A., & Lanzara, A. (2015). Influence of optically quenched superconductivity on quasiparticle relaxation rates in Bi2Sr2CaCu2 O8+δ. Physical Review B - Condensed Matter and Materials Physics, 92(16), [161102]. https://doi.org/10.1103/PhysRevB.92.161102