Drude peak displacement by quantum acoustics

ORAL

Abstract

The interaction of electrons with lattice vibration has a central role in numerous phenomena in condensed matter; yet this is often overlooked when regarding the puzzling features of strange and bad metals. Here we unveil the buildup of a displaced Drude peak due to lattice vibration: the optical conductivity exhibits a finite frequency maximum in the far infra-red range while the d.c. conductivity is suppressed. Specifically, our findings shed light on the experimental observations of temperature-dependent electronic absorption peaks in strange/bad metals, where the dynamical lattice disorder steers the system towards non-Drude behavior.

* J.K.-R. thanks the Emil Aaltonen Foundation, the Vaisala Foudation and the Oskar Huttunen Foundation for financial support. A.M.G. thanks the Harvard Quantum Initiative for financial support. S.Y. and X.O. thanks School of Phyics, Peking University for financial support.

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Publication: J. Keski-Rahkonen, X. Ouyang, S. Yuan, A.M. Graf, A. Aydin, and E.J. Heller (n.d.), Quantum-Acoustic Drude Peak Shift

Presenters

  • Xiaoyu Ouyang

    Department of Physics, Harvard University, Harvard University, Cambridge, MA 02138, USA, Peking University

Authors

  • Xiaoyu Ouyang

    Department of Physics, Harvard University, Harvard University, Cambridge, MA 02138, USA, Peking University

  • Joonas Keski-Rahkonen

    Harvard University

  • Eric J Heller

    Department of Physics, Harvard University, Harvard University, Cambridge, MA 02138, USA, Harvard University

  • Anton M Graf

    Department of Physics, Harvard University, Harvard University, Cambridge, MA 02138, USA, Harvard University

  • Alhun Aydin

    Sabanci University

  • Shaobing Yuan

    Peking University, Peking Univ