Excitons in Mott insulator

ORAL

Abstract

We study the behaviors of excitons formed by spinless charges in the antiferromagnetically ordered phase of Mott insulators. We start from the slave fermion Hubbard model with linear spin wave approximation on the bosonic spinons and obtain the dispersion of dressed doublons and holons using self-consistent Born approximation. We derive the Bethe-Salpeter equation for the two particle Green's function of dressed doublon and holon to find the bound states between a doublon and a holon and identify them as excitons. We investigate several properties of Mott excitons.

*T-S. H. would like to thank Physics Frontier Center at the Joint Quantum Institute for supporting this project.

–

Presenters

  • Tsung-Sheng Huang

    • University of Maryland, College Park

Authors

  • Tsung-Sheng Huang

    • University of Maryland, College Park

  • Christopher Baldwin

    • University of Maryland, College Park

  • Mohammad Hafezi

    • University of Maryland, College Park
    • UMD, Joint Quantum Institute

  • Victor Galitski

    • UMD, Joint Quantum Institute
    • Joint Quantum Institute and Department of Physics, University of Maryland
    • University of Maryland, College Park