Vector, bidirector, and Bloch skyrmion phases induced by structural crystallographic symmetry breaking

@article{Erb2020VectorBA,
  title={Vector, bidirector, and Bloch skyrmion phases induced by structural crystallographic symmetry breaking},
  author={Kay Condie Erb and Jiř{\'i} Hlinka},
  journal={Physical Review B},
  year={2020},
  volume={102},
  pages={024110}
}
The 212 species of structural phase transitions which break macroscopic symmetry are analyzed with respect to the occurrence of time-reversal-invariant vector and bidirector order parameters. The possibility of discerning the orientational domain states of the low-symmetry phase by these ``vectorlike'' physical properties has been derived using a computer algorithm exploiting the concept of polar, axial, chiral, and neutral dipoles. It is argued that the presence of a pseudo-Lifshitz invariant… 
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References

SHOWING 1-10 OF 53 REFERENCES

Phys

  • Rev. Lett. 116, 177602
  • 2016

Magnetic skyrmions in nanostructures of non-centrosymmetric materials

Magnetic skyrmions are a new form of magnetic ordering with whirlpool-like spin arrangements. These topologically protected particlelike spin textures were first discovered a decade ago in

Skyrmions in ferroelectric materials

Hopfions emerge in ferroelectrics

TLDR
It is theoretically demonstrated that Hopfions are fundamental topological formations in confined ferroelectrics governing their electromagnetic response and can result in advanced functionalities of these materials.

Broken symmetries, non-reciprocity, and multiferroicity

The interplay of space and time symmetries, ferroic properties, chirality and notions of reciprocity determines many of the technologically important properties of materials such as optical diode

Frequency-dependent current density tensors as density functions of dynamic polarizabilities.

TLDR
Frequency-dependent current density tensors can be interpreted as the integrand function in 3d-space integrals defining dynamic molecular response tensors, e.g., electric dipole, mixed electric dipoles-magnetic dipoles, andElectric dipole-quadrupole polarizabilites.

Anisotropic Superexchange Interaction and Weak Ferromagnetism

A theory of anisotropic superexchange interaction is developed by extending the Anderson theory of superexchange to include spin-orbit coupling. The antisymmetric spin coupling suggested by

Possible Species of Ferromagnetic, Ferroelectric, and Ferroelastic Crystals

A ferromagnetic, ferroelectric, or ferroelastic crystal is called full or partial, according to whether all or not all but some of its orientation states are different in spontaneous magnetization
...