Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Spin Seebeck Effect near the Antiferromagnetic Spin-Flop Transition   We develop a low-temperature, long-wavelength theory for the interfacial spin
Seebeck effect (SSE) in easy-axis antiferromagnets. The field-induced spin-flop
(SF) transition of N\'eel order is associated with a qualitative change in SSE
behavior: Below SF, there are two spin carriers with opposite magnetic moments,
with the carriers polarized along the field forming a majority magnon band.
Above SF, the low-energy, ferromagnetic-like mode has magnetic moment opposite
the field. This results in a sign change of the SSE across SF, which agrees
with recent measurements on Cr$_2$O$_3$/Pt and Cr$_2$O$_3$/Ta devices [Li
$\textit{et al.,}$ $\textit{Nature}$ $\textbf{578,}$ 70 (2020)]. In our theory,
SSE is due to a N\'eel spin current below SF and a magnetic spin current above
SF. Using the ratio of the associated N\'eel to magnetic spin-mixing
conductances as a single constant fitting parameter, we reproduce the field
dependence of the experimental data and partially the temperature dependence of
the relative SSE jump across SF.

25
The categories of this paper are: patt-sol
28
The categories of this paper are: alg-geom
22
The categories of this paper are: chao-dyn
2
The categories of this paper are: math
12
The categories of this paper are: nucl-th
6
The categories of this paper are: astro-ph
36
The categories of this paper are: cmp-lg
23
The categories of this paper are: solv-int
16
The categories of this paper are: stat
26
The categories of this paper are: bayes-an
15
The categories of this paper are: nucl-ex
17
The categories of this paper are: q-fin
29
The categories of this paper are: funct-an
0
The categories of this paper are: hep-ph
11
The categories of this paper are: hep-lat
7
The categories of this paper are: hep-th