2006/06/09 by Shin‐ichi Kimura, Shin-ichi Kimura, Takafumi Mizuno +6 · 1 citation
Materials Science · Physics and Astronomy · #Iron-based superconductors research #Magnetic and transport properties of perovskites and related materials #Rare-earth and actinide compounds #cond-mat.mtrl-sci #cond-mat.str-el
paper · pdf · doi:10.1103/physrevb.73.214416
published as Phys. Rev. B 73, 214416 (2006) · 5 pages, 5 figures
openalex publication_date 2006/06/09 · arxiv created 2006/08/29 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
Temperature-dependent infrared reflectivity spectra of SrFe4Sb12 has been measured. A renormalized Drude peak with a heavy effective mass and a pronounced pseudogap of 10\phantom\rule0.3em0exmeV develops in the optical conductivity spectra at low temperatures. As the temperature decreases below 100\phantom\rule0.3em0exK, the effective mass (m*) rapidly increases, and the scattering rate (1∕\ensuremathτ) is quenched. The temperature dependence of m* and 1∕\ensuremathτ indicates that the hybridization between the Fe 3d spins and the charge carriers plays an important role in determining the physical properties of SrFe4Sb12 at low temperatures. This result is the clear evidence of the iron-based heavy quasiparticles.