Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Transformation of spin current by antiferromagnetic insulators   It is demonstrated theoretically that a thin layer of an anisotropic
antiferromagnetic (AFM) insulator can effectively conduct spin current by
excitation of a pair of evanescent AFM spin wave modes. The spin current
flowing through the AFM is not conserved due to the interaction between the
excited AFM modes and the AFM lattice, and, depending on the excitation
conditions, can be either attenuated or enhanced. When the phase difference
between the excited evanescent modes is close to $\pi/2$, there is an optimum
AFM thickness for which the output spin current reaches a maximum, that can
significantly exceed the magnitude of the input spin current. The spin current
transfer through the AFM depends on the ambient temperature and increases
substantially when temperature approaches the Neel temperature of the AFM
layer.

34
The categories of this paper are: chem-ph
28
The categories of this paper are: alg-geom
23
The categories of this paper are: solv-int
31
The categories of this paper are: ao-sci
1
The categories of this paper are: cs
11
The categories of this paper are: hep-lat
5
The categories of this paper are: gr-qc
7
The categories of this paper are: hep-th
10
The categories of this paper are: q-bio
13
The categories of this paper are: quant-ph
17
The categories of this paper are: q-fin
3
The categories of this paper are: physics
12
The categories of this paper are: nucl-th
9
The categories of this paper are: nlin
24
The categories of this paper are: dg-ga
8
The categories of this paper are: hep-ex