Bose metal phase in a simple honeycomb lattice model

ORAL

Abstract

The existence of quantum spin liquids was first conjectured by Pomeranchuk some 70 years ago, who argued that frustration in simple antiferromagnetic theories could result in a Fermi-liquid-like state for spinon excitations. Here we present evidence that a simple quantum spin model on a honeycomb lattice hosts the long sought for Bose metal with a clearly identifiable Bose surface. The complete phase diagram of the model is determined via exact diagonalization and is shown to include four distinct phases separated by three quantum phase transitions. The stability of the Bose metal phase in the presence of other interactions is also discussed.

*This research is supported by US-ARO, JQI-NSF-PFC, and the Office of Naval Research.

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Authors

  • Christopher Varney

    • University of Massachusetts, Amherst / Georgetown University / University of Maryland
    • University of Massachusetts, Amherst

  • Kai Sun

    • University of Maryland
    • Condensed Matter Theory Center, University of Maryland, College Park
    • Condensed Matter Theory Center, Department of Physics, University of Maryland, College Park
    • Condensed Matter Theory Center, Department of Physics, University of Maryland, College Park, MD 20742
    • University of Maryland, College Park

  • Victor Galitski

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

  • Marcos Rigol

    • Georgetown University
    • Department of Physics, Georgetown University, Washington DC 20057, USA