Iron-based heavy quasiparticles in SrFe4Sb12: An infrared spectroscopic study

Shin-ichi Kimura, Takafumi Mizuno, Hojun Im, Katsuyuki Hayashi, Eiichi Matsuoka, and Toshiro Takabatake
Phys. Rev. B 73, 214416 – Published 9 June 2006

Abstract

Temperature-dependent infrared reflectivity spectra of SrFe4Sb12 has been measured. A renormalized Drude peak with a heavy effective mass and a pronounced pseudogap of 10meV develops in the optical conductivity spectra at low temperatures. As the temperature decreases below 100K, the effective mass (m*) rapidly increases, and the scattering rate (1τ) is quenched. The temperature dependence of m* and 1τ 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.

  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Received 10 April 2006

DOI:https://doi.org/10.1103/PhysRevB.73.214416

©2006 American Physical Society

Authors & Affiliations

Shin-ichi Kimura*

  • UVSOR Facility, Institute for Molecular Science, Okazaki 444-8585, Japan and School of Physical Sciences, The Graduate University for Advanced Studies (SOKENDAI), Okazaki 444-8585, Japan

Takafumi Mizuno and Hojun Im

  • School of Physical Sciences, The Graduate University for Advanced Studies (SOKENDAI), Okazaki 444-8585, Japan

Katsuyuki Hayashi and Eiichi Matsuoka

  • Department of Quantum Matter, ADSM, Hiroshima University, Higashi-Hiroshima 739-8530, Japan

Toshiro Takabatake

  • Department of Quantum Matter, ADSM, Hiroshima University, Higashi-Hiroshima 739-8530, Japan and Institute for Advanced Materials Research, Hiroshima University, Higashi-Hiroshima 739-8530, Japan

  • *Electronic address: kimura@ims.ac.jp
  • Present address: Department of Physics, Tohoku University,Sendai, Japan

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 73, Iss. 21 — 1 June 2006

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review B

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×