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THz electrodynamics of mixed-valent YbAl $$_3$$ 3 and LuAl $$_3$$ 3 thin films

Author

Listed:
  • D. Barbalas

    (The Johns Hopkins University)

  • S. Chatterjee

    (Cornell University
    University of California)

  • D. G. Schlom

    (Cornell University
    Kavli Institute at Cornell for Nanoscale Science
    Leibniz-Institut für Kristallzüchtung)

  • K. M. Shen

    (Cornell University
    Kavli Institute at Cornell for Nanoscale Science)

  • N. P. Armitage

    (The Johns Hopkins University)

Abstract

We present our results from time-domain THz spectroscopy measurements of thin films of mixed-valent YbAl $$_3$$ 3 and its structural analogue LuAl $$_3$$ 3 . Combined with Fourier transform infrared (FTIR) spectroscopy, the extended Drude formalism is utilized to study the quasiparticle scattering rate and effective masses in YbAl $$_3$$ 3 . We find that LuAl $$_3$$ 3 demonstrates conventional Drude transport whereas at low temperatures YbAl $$_3$$ 3 demonstrates a renormalized Drude peak and a mid-infrared (MIR) peak in the conductivity, indicative of the formation of a mass-enhanced Fermi liquid (FL). In YbAl $$_3$$ 3 the extended Drude analysis demonstrates consistency with FL behavior below the FL coherence temperature $$T^*

Suggested Citation

  • D. Barbalas & S. Chatterjee & D. G. Schlom & K. M. Shen & N. P. Armitage, 2021. "THz electrodynamics of mixed-valent YbAl $$_3$$ 3 and LuAl $$_3$$ 3 thin films," The European Physical Journal B: Condensed Matter and Complex Systems, Springer;EDP Sciences, vol. 94(9), pages 1-8, September.
    • Handle: RePEc:spr:eurphb:v:94:y:2021:i:9:d:10.1140_epjb_s10051-021-00191-y
    DOI: 10.1140/epjb/s10051-021-00191-y
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