Renyi entanglement entropy at the chequerboard J-Q transition gives a logarithmic coefficient of about 2.5, corresponding to five Goldstone modes and coplanar O(4) order on an emergent three-sublattice lattice.
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Coplanar order induced by emergent frustration
Renyi entanglement entropy at the chequerboard J-Q transition gives a logarithmic coefficient of about 2.5, corresponding to five Goldstone modes and coplanar O(4) order on an emergent three-sublattice lattice.