Cavity Probes and Control of Antiferromagnetic Fluctuations in a Mott Insulator

ORAL

Abstract

We present a mechanism for coupling the electromagnetic field of a THz cavity to the antiferromagnetic order in a simplified model of an undoped cuprate Mott insulator. In addition to the direct magnetic-dipole coupling between spins and the magnetic component of the near-field radiation, we also consider a more elaborate magnetoelectric coupling which couples various spin-exchange processes to the electric field. We show how these terms can lead to the formation of Neel magnon-polariton resonances, as well as allow for the optical parametric driving of spin-waves. We identify clear experimental signatures to look for in a proposed setup. Finally, we conclude by speculating about the fate of charge carriers doped into the system in the presence of our coupling scheme.

*J.B.C. acknowledges support from the Harvard Quantum Initiative (HQI).

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Presenters

  • Jonathan Curtis

    • Harvard University

Authors

  • Jonathan Curtis

    • Harvard University

  • Andrey Grankin

    • University of Maryland, College Park

  • Nicholas Poniatowski

    • Harvard University
    • Maryland Quantum Materials Center, Department of Physics, University of Maryland, College Park

  • Prineha Narang

    • Harvard University
    • SEAS, Harvard University
    • John A. Paulson School of Engineering & Applied Science, Harvard University
    • Harvard John A. Paulson School of Engineering and Applied Sciences, Harvard University
    • Physics, Harvard University
    • John A. Paulson School of Engineering and Applied Sciences, Harvard University

  • Victor Galitski

    • University of Maryland, College Park

  • Eugene Demler

    • Harvard University
    • Department of Physics, Harvard University