In-plane terahertz response of thin film Sr2RuO4

Y. Takahashi, S. Chakraverty, M. Kawasaki, H. Y. Hwang, and Y. Tokura
Phys. Rev. B 89, 165116 – Published 14 April 2014

Abstract

The low-energy electron dynamics of the quasi-two-dimensional electron-hole multiorbital system Sr2RuO4 is investigated by time-domain terahertz spectroscopy for a thin film sample. The direct observation of the real and imaginary part of the optical conductivity below 8 meV clearly demonstrates a narrowing of the coherent quasiparticle response with decreasing temperature. The optical conductivity spectra, dc conductivity, and Hall coefficient can be quantitatively well described by the multiband Drude-Lorentz model, from which band dependent scattering rates can be extracted. The resulting modest band dependent scattering rates, which are lower than 2 meV at 4 K, support a rather isotropic relaxation regime.

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  • Received 17 October 2013

DOI:https://doi.org/10.1103/PhysRevB.89.165116

©2014 American Physical Society

Authors & Affiliations

Y. Takahashi1, S. Chakraverty2, M. Kawasaki1,2, H. Y. Hwang2,3, and Y. Tokura1,2

  • 1Department of Applied Physics and Quantum Phase Electronics Center, University of Tokyo, Tokyo 113-8656, Japan
  • 2RIKEN Center for Emergent Matter Science, Wako 351-0198, Japan
  • 3Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA

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Issue

Vol. 89, Iss. 16 — 15 April 2014

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