paper

Schwinger boson symmetric spin liquids of Shastry-Sutherland model

arXiv:2308.16563 · doi:10.1103/PhysRevB.109.134409

Abstract

Motivated by recent experimental and numerical evidences of deconfined quantum critical point and quantum spin-liquid states in spin- $1/2$ Heisenberg model on Shastry-Sutherland lattice, we studied possible symmetric spin liquid states and their proximate ordered states under Schwinger boson formalism. We found a symmetric gapped $Z_{2}$ spin-liquid state for intermediate model parameter $0.66 < J_{1} / J_{2} < 0.71$ under mean-field approximation. The Schwinger boson mean-field picture is partially supported by exact-diagonalization and self-consistent spin wave theory results.

23 pages, 20 figures