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Infrared Optical Response of PdCoO<sub>2</sub> thin film

ORAL

Abstract

Optical properties of delafossite PdCoO2 thin film on Al2O3 have been obtained by reflectance, transmittance and ellipsometry measurements in frequency range from 60 cm-1 to 32000 cm-1. The ab-plane Drude electron exhibits frequency-dependent effective mass and the scattering rate, which indicates coupling of the carrier with a boson mode locate at Ω = 760 cm-1. We show that, through additional polarization-dependent measurements on PdCoO2 single crystal, a longitudinal optical (LO) phonon of c-axis corresponds to the boson mode. The coupling of ab-electron with c-axis LO phonon provides a new insight on the electrodynamics of layered metal oxide system.

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Presenters

  • Dongmin Seo

    University of Seoul

Authors

  • Dongmin Seo

    University of Seoul

  • Eunjip Choi

    University of Seoul, Univ of Seoul

  • soonjae moon

    Hanyang University

  • Gihyeon Ahn

    Hanyang Univ

  • Seongshik Oh

    Rutgers University

  • Gaurab Rimal

    Rutgers University

  • Seunghyun Khim

    Max Planck Institute for Chemical Physics of Solids