Quantum spin supersolid as a precursory Dirac spin liquid in a triangular lattice antiferromagnet

Jia, Haichen; Ma, Bowen; Wang, Zidan; Chen, Gang

doi:10.1103/PhysRevResearch.6.033031

Quantum spin supersolid as a precursory Dirac spin liquid in a triangular lattice antiferromagnet

Apr 23, 2023

13 pages

Published in:

Phys.Rev.Res. 6 (2024) 3, 033031

Published: Jul 8, 2024

e-Print:

2304.11716 [cond-mat.str-el]

DOI:

10.1103/PhysRevResearch.6.033031 (publication)

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Abstract: (APS)

Based on the recent experiments on the triangular lattice antiferromagnet

{Na}_{2} BaCo {({PO}_{4})}_{2}

, we propose the easy-axis XXZ spin-1/2 model on the triangular lattice, that exhibits a quantum spin supersolid, to be a precursory Dirac spin liquid. Despite the presence of a three-sublattice magnetic order as a spin supersolid, we suggest that this system is close to a Dirac spin liquid by exploring its spectroscopic response. The physical consequence is examined from the spectroscopic response, and we establish the continuous spectra near the

M

point in addition to the

K

point excitation from the spinon continuum on top of the three-sublattice order. Moreover, the satellite peaks were predicted at the mid-points connecting the

Γ

and

K

points. This proposal offers a plausible understanding of the recent inelastic neutron scattering measurement in

{Na}_{2} BaCo {({PO}_{4})}_{2}

and could inspire further research in relevant models and materials, such as

K_{2} Co {({SeO}_{3})}_{2}

and

{Rb}_{2} Co {({SeO}_{3})}_{2}

, and even more anisotropic magnets like

{PrMgAl}_{11} O_{19}

.

Note:

13 pages, 9 figures. To appear in Phys Rev Research

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