First-order Néel–valence-bond-solid transition in S=32 antiferromagnets,Physical Review B

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First-order Néel–valence-bond-solid transition in S=32 antiferromagnets
Physical Review B ( IF 3.2 ) Pub Date : 2024-09-10 , DOI: 10.1103/physrevb.110.094416
Fan Zhang ₁ , Wenan Guo _{1,

1} , Ribhu K. Kaul ₂

Affiliation

We study the transition between Néel and columnar valence-bond solid ordering in two-dimensional

S = 3 / 2

square lattice quantum antiferromagnets with SO(3) symmetry. According to the deconfined criticality scenario, this transition can be direct and continuous like the well-studied

S = 1 / 2

case. To study the global phase diagram, we work with four multi-spin couplings with full rotational symmetry, that are free of the sign-problem of quantum Monte Carlo. Exploring the phase diagram with quantum Monte Carlo simulations, we find that the phase transition between Néel and valence-bond solid is strongly first-order in the parts of the phase diagram that we have accessed.

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