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