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Data · dataset · 2026

The data of the article "Super-Solid phase in a U(2) symmetric S = 1 Magnet on the Triangular Lattice"

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A spin supersolid is characterized by the simultaneous breaking of lattice translation and continuous spin rotation symmetries.

Description

In this work, we study a spin-1 model with U(2) ∼= SU(2)×U(1)/Z2 symmetry on the triangular lattice, and determine the phase diagram with a variational CP 2 approach. We identify a novel supersolid phase which contains a 3-sublattice solid order and a superfluid order with spontaneous SU(2)-symmetry breaking.

Unlike usual supersolid phases having only one Goldstone mode, the SU(2)-supersolid phase has two Goldstone modes. Another important feature of this supersolid is that the spin excitation spectrum has symmetry protected double degeneracy in the whole Brillouin zone. As by-products, several other ordered phases are obtained, including the ferromagnetic and the antiferromagnetic states breaking the SU(2) symmetry, as well as genuine phases that completely break the U(2) symmetry.

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Furthermore, the instabilities of SU(3)-flavor linear spin-wave theory are consistent with the phase boundaries between different ordered phases.This dataset storage the code of the classical variational method to determine the ground state of a spin-1 U(2) model on triangular lattice, and the SU(3) spin-wave calculation taking these ground states as the reference states, which is the results for our work "Super-Solid phase in a U(2) symmetric S = 1 Magnet on the Triangular Lattice".

In repository "Fig.1,2", the static structure factor(SSF) for the whole parameter region has been computed and figured. In repository "Fig.3,6,7,8", the spin-wave calculation and the lambda8,lambdasu2-expectation visualization code has been supported. In repository "Fig.4", the SSF data for J_3=0.5, 0 has been offered respectively.

And in repository "Fig.5", the data and the code to generate the energy curve and SSF curve for fig.5 in our paper has been offered.

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Provenance · 1 source records, 9 field assertions
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ScienceDB10.57760/sciencedb.j00113.0029312 d agoJSON v1
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