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Schwinger boson symmetric spin liquids of Shastry-Sutherland model

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arxiv 2308.16563 v3 pith:LBQDWY3J submitted 2023-08-31 cond-mat.str-el

Ke Liu , Fa Wang This is my paper · ORCID
classification cond-mat.str-el
keywords bosonmodelschwingerspinstatessymmetricmean-fieldquantum
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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.

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