Iron-Based Heavy Quasiparticles in SrFe${}_4$Sb${}_{12}$: An Infrared Spectroscopic Study

Shin-ichi Kimura, Takafumi Mizuno, Hojun Im +3

Temperature-dependent infrared reflectivity spectra of SrFe${}_4$Sb${}_{12}$ has been measured. A renormalized Drude peak with a heavy effective mass and a pronounced pseudogap of 10…