Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Signatures of quartic asymmetric exchange in a class of two dimensional
  magnets   Indirect quartic interaction of spins is suggested to play an important role
in two dimensional magnets with trigonal prismatic symmetry such as
Fe$_3$GeTe$_2$ monolayer. The proposed interaction is described by terms in
micromagnetic energy that are linear in magnetization gradients. Such terms
enable the stability of non-collinear magnetic textures. We investigate
signatures of the quartic interaction in magnon spectra in the presence of
anisotropy and external magnetic field. We also show how magnetic spirals,
which are induced by the proposed interaction, can be manipulated by external
field. Our analysis is based on symmetry considerations and can be used to
quantify the quartic interaction strength in experiments with magnetic
monolayers.

25
The categories of this paper are: patt-sol
13
The categories of this paper are: quant-ph
22
The categories of this paper are: chao-dyn
28
The categories of this paper are: alg-geom
33
The categories of this paper are: plasm-ph
10
The categories of this paper are: q-bio
2
The categories of this paper are: math
1
The categories of this paper are: cs
29
The categories of this paper are: funct-an
7
The categories of this paper are: hep-th
31
The categories of this paper are: ao-sci
0
The categories of this paper are: hep-ph
16
The categories of this paper are: stat
11
The categories of this paper are: hep-lat
6
The categories of this paper are: astro-ph
37
The categories of this paper are: supr-con