Paired states of Chern-Simons fermions in quantum spin models

ORAL

Abstract

We consider exotic states constructed from the two-dimensional quantum spin-1/2 XY model on the square and hexagonal lattices. By applying a Chern-Simons transformation we represent the quantum spin model as a system of spinless fermions interacting via attached fluxes. The interaction is then decoupled in the Cooper and excitonic channels giving possible unconventional states of Chern-Simons fermions. We examine the mean field properties of these states and their relations to the original spin model.

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Authors

  • Andrew Allocca

    • Univ of Maryland-College Park

  • Tigran Sedrakyan

    • Fine Theoretical Physics Institute, Univ of Minnesota and Physics Frontier Center, Joint Quantum Institute, Univ of Maryland
    • W. I. Fine Theoretical Physics Institute, University of Minnesota, Joint Quantum Institute, University of Maryland - College Park

  • Victor Galitski

    • University of Maryland
    • Joint Quantum Institute and Condensed Matter Theory Center, University of Maryland, College Park
    • Department of Physics, University of Maryland, College Park, Maryland 20742
    • University of Maryland, College Park
    • Univ of Maryland-College Park
    • Joint Quantum Institute and Condensed Matter Theory Center, University of Maryland, United States