Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Theory of a Weak-Link Superconductor-Ferromagnet Josephson Structure   We propose a model for the theoretical description of a weak-link Josephson
junction, in which the weak link is spin-polarized due to proximity to a
ferromagnetic metal (S-(F|S)-S). Employing Usadel transport theory appropriate
for diffusive systems, we show that the weak link is described within the
framework of Andreev circuit theory by an effective self-energy resulting from
the implementation of spin-dependent boundary conditions. This leads to a
considerable simplification of the model, and allows for an efficient numerical
treatment. As an application of our model, we show numerical calculations of
important physical observables such as the local density of states,
proximity-induced minigaps, spin-magnetization, and the phase and
temperature-dependence of Josephson currents of the S-(F|S)-S system. We
discuss multi-valued current-phase relationships at low temperatures as well as
their crossover to sinusoidal form at high temperatures. Additionally, we
numerically treat (S-F-S) systems that exhibit a magnetic domain wall in the F
region and calculate the temperature- dependence of the critical currents.

17
The categories of this paper are: q-fin
2
The categories of this paper are: math
19
The categories of this paper are: eess
31
The categories of this paper are: ao-sci
20
The categories of this paper are: acc-phys
0
The categories of this paper are: hep-ph
33
The categories of this paper are: plasm-ph
37
The categories of this paper are: supr-con
27
The categories of this paper are: comp-gas
26
The categories of this paper are: bayes-an
15
The categories of this paper are: nucl-ex
36
The categories of this paper are: cmp-lg
1
The categories of this paper are: cs
25
The categories of this paper are: patt-sol
23
The categories of this paper are: solv-int
13
The categories of this paper are: quant-ph