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