Retaining full momentum-resolved vertices removes the predicted van Hove singularities in CrBr3 magnons and yields T^3 (optical) versus T^2 (acoustic) second-order renormalization.
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Interacting Dirac magnons in the van der Waals ferromagnet CrBr$_3$
Retaining full momentum-resolved vertices removes the predicted van Hove singularities in CrBr3 magnons and yields T^3 (optical) versus T^2 (acoustic) second-order renormalization.