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ID 19296
file
creator
Kimura, Shin-ichi
Mizuno, Takafumi
Im, Hojun
Hayashi, Katsuyuki
Matsuoka, Eiichi
abstract
Temperature-dependent infrared reflectivity spectra of Sr Fe4 Sb12 has been measured. A renormalized Drude peak with a heavy effective mass and a pronounced pseudogap of 10 meV develops in the optical conductivity spectra at low temperatures. As the temperature decreases below 100 K, the effective mass (m*) rapidly increases, and the scattering rate (1 τ) is quenched. The temperature dependence of m* and 1 τ indicates that the hybridization between the Fe 3d spins and the charge carriers plays an important role in determining the physical properties of Sr Fe4 Sb12 at low temperatures. This result is the clear evidence of the iron-based heavy quasiparticles.
journal title
Physical Review B - Condensed Matter and Materials Physics
volume
Volume 73
issue
Issue 21
start page
214416-1
end page
214416-5
date of issued
2006-06-09
publisher
American Physical Society
issn
1098-0121
ncid
publisher doi
language
eng
nii type
Journal Article
HU type
Journal Articles
DCMI type
text
format
application/pdf
text version
publisher
rights
Copyright (c) 2006 The American Physical Society.
relation url
department
Graduate School of Advanced Sciences of Matter