Quasiparticle mass enhancement and temperature evolution of the electronic structure in ferromagnetic SrRuO$_{3}$

ORAL

Abstract

We report high-resolution angle-resolved photoemission spectroscopy (ARPES) studies of epitaxial thin films of the correlated $4d$ transition metal oxide ferromagnet SrRuO$_{3}$. The Fermi surface in the ferromagnetic state consists of well-defined Landau quasiparticles, exhibiting strong coupling to low-energy bosonic modes which contributes to the large effective masses observed by transport and thermodynamic measurements. Upon warming the material through its Curie temperature, we observe a substantial decrease in quasiparticle coherence, but negligible changes in the ferromagnetic exchange splitting, suggesting that local moments play an important role in the ferromagnetism in SrRuO$_{3}$.

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Authors

  • Daniel Shai

    • Cornell University

  • Carolina Adamo

    • Cornell University

  • Dawei Shen

    • Shanghai Institute of Microsystem and Information Technology, China

  • Charles Brooks

    • Cornell University

  • John Harter

    • Cornell University

  • Eric Monkman

    • Cornell University

  • Bulat Burganov

    • Cornell University

  • Darrell Schlom

    • Cornell University

  • Kyle Shen

    • Cornell University