Low-energy electrodynamics of heavy quasiparticles in ZrZn2

Shin Ichi Kimura, Noriaki Kimura, Hayuyoshi Aoki

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

The temperature dependence of the optical conductivity spectrum of an itinerant ferromagnetic material, ZrZn2, was obtained and the dynamical effective mass and the scattering rate were derived. A renormalized Drude peak with a heavy effective mass developed at low temperatures. The effective mass rapidly increased below ℏω = 10 meV and at 10K it was observed to be 3 times heavier than that at 300 K. The scattering rate also rapidly decreased below 10 meV at 10 K. These results indicate the creation of heavy quasiparticles at low temperatures due to spin fluctuations.

Original languageEnglish
Article number084710
Journaljournal of the physical society of japan
Volume76
Issue number8
DOIs
Publication statusPublished - 2007 Aug 1

Keywords

  • Electronic structure
  • Optical conductivity
  • Spin fluctuation
  • ZrZn

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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