Emergent O(4) Symmetry and Conserved Current Continuum at a Deconfined Quantum Critical Point in Shastry-Sutherland Model

ORAL

Abstract

In this work, we investigate a possibility of deconfined quantum phase transition in the two dimensional Shastry-Sutherland spin model. Using the level-crossing technique for correlation length spectrum in the infinite DMRG simulation, we demonstrate the evidence for a deconfinement and emergent O(4) symmetry at the phase transition between the plaquette valence bond solid and Neel order. Such a phase transition has been observed in the recent experiment, and we propose experimental signatures for this deconfined quantum criticality that can be measured in both phonon and magnon spectra.

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Presenters

  • Jong Yeon Lee

    • Harvard University
    • Department of Physics, Harvard University

Authors

  • Jong Yeon Lee

    • Harvard University
    • Department of Physics, Harvard University

  • Yizhuang You

    • University of California, San Diego
    • Department of Physics, Harvard University
    • Physics, University of California, San Diego
    • Department of Physics, University of California, San Diego
    • Harvard University
    • UCSD

  • Ashvin Vishwanath

    • Harvard Univ
    • Physics Department, Harvard University
    • Department of Physics, Harvard University
    • Harvard University
    • Physics, Harvard University
    • Havard University