Recent work has shown that the triangular lattice spin-1/2J1-J2 Heisenberg and XXZ antiferromagnets may exhibit coplanar or supersolid orders proximate to a gapless Dirac spin liquid phase. We explore a distinct SU(2N)×SU(M) fermionic parton approach, complemented by variational Monte Carlo calculations for the spin-1/2 model, to study the phase diagram of these models. We also calculate their dynamical spin response including parton interactions within a random phase approximation, and discuss implications for neutron scattering on triangular lattice cobaltates Ba3CoSb2O9, Na2BaCo(PO4)2, K2Co(SeO3)2, Rb2Co(SeO3)2, and Yb-based magnet KYbSe2.
@article{arxiv.2503.09695,
title = {Modified large-$N$ approach to gapless spin liquids, magnetic orders, and dynamics: Application to triangular lattice antiferromagnets},
author = {Anjishnu Bose and Kathleen Hart and Ruairidh Sutcliffe and Arun Paramekanti},
journal= {arXiv preprint arXiv:2503.09695},
year = {2025}
}