Spectra of a gapped quantum spin liquid with a strong chiral excitation on the triangular lattice

Whereas a quantum spin liquid (QSL) phase has been identified in the ${J}_{1}\text{\ensuremath{-}}{J}_{2}$ Heisenberg model on triangular lattice via numerical calculations, debate persists about whether or not such QSL is gapped gapless with contradictory conclusions from different techniques. Moreover, information excitations and dynamics crucial for experimental detection of phase. In this paper, we use exact diagonalization to characterize signatures through dynamical structure factor $\mathcal{S}(q,\ensuremath{\omega})$ Raman susceptibility $\ensuremath{\chi}(\ensuremath{\omega})$. We find that spectra show distinct features compared those neighboring phases; both behavior Interestingly, there prominent excitation mode ${A}_{2}$ channel, indicating strong subleading tendency toward chiral