Checkerboard bubble lattice formed by octuple-period quadruple- spin density waves
arXiv:2307.10444 · doi:10.1103/PhysRevB.108.094415
Abstract
We investigate multiple- instability on a square lattice at particular ordering wave vectors. We find that a superposition of quadruple- spin density waves, which are connected by fourfold rotational and mirror symmetries, gives rise to a checkerboard bubble lattice with a collinear spin texture as a result of the geometry among the constituent ordering wave vectors in the Brillouin zone. By performing the simulated annealing for a fundamental spin model, we show that such a checkerboard bubble lattice is stabilized under an infinitesimally small easy-axis two-spin anisotropic interaction and biquadratic interaction at zero field, while it is degenerate with an anisotropic double- state in the absence of the biquadratic interaction. The obtained multiple- structures have no intensities at high-harmonic wave vectors in contrast to other multiple- states, such as a magnetic skyrmion lattice. We also show that the checkerboard bubble lattice accompanies the charge density wave and exhibits a nearly flat band dispersion in the electronic structure. Our results provide another route to realize exotic multiple- spin textures by focusing on the geometry and symmetry in terms of the wave vectors in momentum space.
10 pages, 10 figures
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- Stabilization mechanisms of magnetic skyrmion crystal and multiple- states based on momentum-resolved spin interactions
- On the multi- characteristics of magnetic ground states of honeycomb cobalt oxides
- Linked skyrmions in shifted magnetic bilayer
- Phenomenological Ginzburg-Landau theory for triple-Q magnetic orders on a hexagonal lattice
- Double- and quadruple- instabilities at low-symmetric ordering wave vectors under tetragonal symmetry