Coherent optical phonons in the iron oxypnictide SmFeAsO 1-xFx (x = 0:075)

Hiroshi Takahashi, Yoichi Kamihara, Hiroaki Koguchi, Toshiyuki Atou, Hideo Hosono, Ikufumi Katayama, Jun Takeda, Masahiro Kitajima, Kazutaka G. Nakamura

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Abstract

Coherent optical phonons with the Fe-related mode B1g(Fe) in the iron oxypnictide SmFeAsO1-xFx (x - 0:075) are observed using femtosecond time-resolved reflection measurements with electrooptic sampling, in addition to the A1g(Sm) and A1g(As) modes. The time evolution of the frequency and amplitude of optical phonons is studied and the lifetimes of phonons are estimated. The frequency softening and positive frequency chirp related to the strong carrierphonon coupling are found for the A1g(Sm) mode.

Original languageEnglish
Article number013707
JournalJournal of the Physical Society of Japan
Volume80
Issue number1
DOIs
Publication statusPublished - 2011 Jan 1

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Keywords

  • Coherent phonons
  • Femtosecond laser
  • Iron oxypnictide

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Takahashi, H., Kamihara, Y., Koguchi, H., Atou, T., Hosono, H., Katayama, I., Takeda, J., Kitajima, M., & Nakamura, K. G. (2011). Coherent optical phonons in the iron oxypnictide SmFeAsO 1-xFx (x = 0:075). Journal of the Physical Society of Japan, 80(1), [013707]. https://doi.org/10.1143/JPSJ.80.013707