Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Symmetry breaking induced magnon-magnon coupling in synthetic
  antiferromagnets   We propose a general theory of microwave absorption spectroscopy for
symmetry-breaking synthetic antiferromagnets (SAFs). Generally, inhomogeneity
or different thickness of the two ferromagnetic sublayers of a SAF results in
the intrinsic symmetry breaking, while out-of-plane components of dc magnetic
fields lead to the extrinsic one. The broken symmetry of SAFs excludes the
original symmetry-protected crossing between pure in-phase and out-of-phase
resonance modes with opposite parity. Alternatively, new frequency branches
become hybridization of original bare modes in terms of
symmetry-breaking-induced magnon-magnon coupling, which results in an indirect
gap in ferromagnetic resonance frequencies. Also, the dependence of gap width
on the degree of symmetry breaking for several typical cases are presented and
compared with existing experiments. Our theory provides a simple but physical
understanding on the rich structure of ferromagnetic resonance spectra for
asymmetric SAFs.

8
The categories of this paper are: hep-ex
10
The categories of this paper are: q-bio
16
The categories of this paper are: stat
0
The categories of this paper are: hep-ph
23
The categories of this paper are: solv-int
14
The categories of this paper are: math-ph
1
The categories of this paper are: cs
34
The categories of this paper are: chem-ph
17
The categories of this paper are: q-fin
2
The categories of this paper are: math
22
The categories of this paper are: chao-dyn
24
The categories of this paper are: dg-ga
11
The categories of this paper are: hep-lat
32
The categories of this paper are: atom-ph
29
The categories of this paper are: funct-an
9
The categories of this paper are: nlin