Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Persistent spin oscillations in a spin-orbit-coupled superconductor   Quasi-two-dimensional superconductors with tunable spin-orbit coupling are
very interesting systems with properties that are also potentially useful for
applications. In this manuscript we demonstrate that these systems exhibit
undamped collective spin oscillations that can be excited by the application of
a supercurrent. We propose to use these collective excitations to realize
persistent spin oscillators operating in the frequency range of 10 GHz - 1 THz.

25
The categories of this paper are: patt-sol
34
The categories of this paper are: chem-ph
1
The categories of this paper are: cs
36
The categories of this paper are: cmp-lg
7
The categories of this paper are: hep-th
27
The categories of this paper are: comp-gas
16
The categories of this paper are: stat
17
The categories of this paper are: q-fin
22
The categories of this paper are: chao-dyn
37
The categories of this paper are: supr-con
15
The categories of this paper are: nucl-ex
2
The categories of this paper are: math
18
The categories of this paper are: econ
3
The categories of this paper are: physics
0
The categories of this paper are: hep-ph
33
The categories of this paper are: plasm-ph