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Modified large-$N$ approach to gapless spin liquids, magnetic orders, and dynamics: Application to triangular lattice antiferromagnets

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arxiv 2503.09695 v2 pith:UPPAWSX3 submitted 2025-03-12 cond-mat.str-el

Anjishnu Bose , Kathleen Hart , Ruairidh Sutcliffe , Arun Paramekanti This is my paper
classification cond-mat.str-el
keywords latticephasespintriangularantiferromagnetsapproachgaplessorders
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abstract

Recent work has shown that the triangular lattice spin-$1/2$ $J_1$-$J_2$ Heisenberg and XXZ antiferromagnets may exhibit coplanar or supersolid orders proximate to a gapless Dirac spin liquid phase. We explore a distinct $SU(2N)\!\!\times\!\!SU(M)$ 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 Ba$_3$CoSb$_2$O$_9$, Na$_2$BaCo(PO$_4$)$_2$, K$_2$Co(SeO$_3$)$_2$, Rb$_2$Co(SeO$_3$)$_2$, and Yb-based magnet KYbSe$_2$.

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Cited by 1 Pith paper

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Non-linear spin wave theory in the strong easy-axis limit of the triangular XXZ model

    cond-mat.str-el 2025-11 conditional novelty 7.0 of 10

    In the strong easy-axis limit, the triangular XXZ model reduces to a honeycomb-lattice boson model with nearest-neighbour repulsion, whose one-loop spectrum yields a sqrt(V) pseudo-Goldstone gap and no roton minimum.

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