Schwinger boson symmetric spin liquids of Shastry-Sutherland model
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 Z2 spin-liquid state for intermediate model parameter 0.66 < J1/J2 < 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.
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