Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Reversible control of spin-polarised supercurrents in ferromagnetic
  Josephson junctions   Magnetic inhomogeneity at a superconductor (S)/ferromagnet (F) interface
converts spin-singlet Cooper pairs into spin-one triplet pairs. These pairs are
immune to the pair-breaking exchange field in F and support a long-range
proximity effect. Although recent experiments have confirmed the existence of
spin-polarised triplet supercurrents in S-F-S Josephson junctions, reversible
control of the supercurrent has been impossible because of the robust
pre-configured nature of the inhomogeneity. Here we use a barrier comprising
three F layers whose relative magnetic orientation, and hence the interfacial
inhomogeneity, can be controlled by small magnetic fields; we show that this
enables full control of the triplet supercurrent and, by using finite element
micromagnetic simulations, we can directly relate the experimental data to the
theoretical models which provide a general framework to understand the role
played by magnetic states in long-range supercurrent modulation.

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The categories of this paper are: hep-ph
12
The categories of this paper are: nucl-th
11
The categories of this paper are: hep-lat
9
The categories of this paper are: nlin
26
The categories of this paper are: bayes-an
30
The categories of this paper are: q-alg
5
The categories of this paper are: gr-qc
1
The categories of this paper are: cs
13
The categories of this paper are: quant-ph
25
The categories of this paper are: patt-sol
6
The categories of this paper are: astro-ph
31
The categories of this paper are: ao-sci
15
The categories of this paper are: nucl-ex
35
The categories of this paper are: mtrl-th
17
The categories of this paper are: q-fin
8
The categories of this paper are: hep-ex