Ultrafast quasiparticle dynamics of FeTe0.75Se0.25 superconductor Y. Kabasawa, T. Eda, J. Hu, I. Katayama, J. Takeda, M. Kitajima, T. Katagiri, T. Sasagawa and K. G. Nakamura EPJ Web of Conferences, 41 (2013) 03009 Published online: 13 March 2013 DOI: 10.1051/epjconf/20134103009