@article{oai:ynu.repo.nii.ac.jp:00004097,
 author = {Takahashi, Hiroshi and Kamihara, Yoichi and Koguchi, Hiroaki and Atou, Toshiyuki and Hosono, Hideo and Katayama, Ikufumi and Takeda, Jun and Kitajima, Masahiro and Nakamura, Kazutaka G.},
 issue = {1},
 journal = {Journal of the physical society of Japan},
 month = {},
 note = {application/pdf, Coherent optical phonons with the Fe-related mode B_1g(Fe) in the iron oxypnictide SmFeAsO_1-xF_x (x=0.075) are observed using femtosecond time-resolved reflection measurements with electrooptic sampling, in addition to the A_1g(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 carrier-phonon coupling are found for the A1g(Sm) mode.},
 pages = {13707--13707-4},
 title = {Coherent optical phonons in the iron oxypnictide SmFeAsO_1-xF_x (x=0.075)},
 volume = {80},
 year = {2011}
}