Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Stability and lifetime of antiferromagnetic skyrmions   The two-dimensional Heisenberg exchange model with out-of-plane anisotropy
and a Dzyaloshinskii-Moriya interaction is employed to investigate the lifetime
and stability of antiferromagnetic (AFM) skyrmions as a function of temperature
and external magnetic field. An isolated AFM skyrmion is metastable at zero
temperature in a certain parameter range set by two boundaries separating the
skyrmion state from the uniform AFM phase and a stripe domain phase. The
distribution of the energy barriers for the AFM skyrmion decay into the uniform
AFM state complements the zero-temperature stability diagram and demonstrates
that the skyrmion stability region is significantly narrowed at finite
temperatures.We show that the AFM skyrmion stability can be enhanced by an
application of magnetic field, whose strength is comparable to the spin-flop
field. This stabilization of AFM skyrmions in external magnetic fields is in
sharp contrast to the behavior of their ferromagnetic counterparts.
Furthermore, we demonstrate that the AFM skyrmions are stable on timescales of
milliseconds below 50 K for realistic material parameters, making it feasible
to observe them in modern experiments.

23
The categories of this paper are: solv-int
1
The categories of this paper are: cs
32
The categories of this paper are: atom-ph
5
The categories of this paper are: gr-qc
9
The categories of this paper are: nlin
34
The categories of this paper are: chem-ph
14
The categories of this paper are: math-ph
24
The categories of this paper are: dg-ga
16
The categories of this paper are: stat
19
The categories of this paper are: eess
22
The categories of this paper are: chao-dyn
10
The categories of this paper are: q-bio
21
The categories of this paper are: adap-org
7
The categories of this paper are: hep-th
33
The categories of this paper are: plasm-ph
36
The categories of this paper are: cmp-lg