Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Supercurrent decay in ballistic magnetic Josephson junctions   We investigate transport properties of ballistic magnetic Josephson junctions
and establish that suppression of supercurrent is an intrinsic property of the
junctions, even in absence of disorder. By studying the role of ferromagnet
thickness, magnetization, and crystal orientation we show how the supercurrent
decays exponentially with thickness and identify two mechanisms responsible for
the effect: (i) large exchange splitting may gap out minority or majority
carriers leading to the suppression of Andreev reflection in the junction, (ii)
loss of synchronization between different modes due to the significant
dispersion of the quasiparticle velocity with the transverse momentum. Our
results for Nb/Ni/Nb junctions are in good agreement with recent experimental
studies. Our approach combines density functional theory and Bogoliubov-de
Gennes model and opens a path for material composition optimization in magnetic
Josephson junctions and superconducting magnetic spin valves.

26
The categories of this paper are: bayes-an
6
The categories of this paper are: astro-ph
36
The categories of this paper are: cmp-lg
34
The categories of this paper are: chem-ph
35
The categories of this paper are: mtrl-th
28
The categories of this paper are: alg-geom
11
The categories of this paper are: hep-lat
24
The categories of this paper are: dg-ga
5
The categories of this paper are: gr-qc
27
The categories of this paper are: comp-gas
37
The categories of this paper are: supr-con
29
The categories of this paper are: funct-an
17
The categories of this paper are: q-fin
9
The categories of this paper are: nlin
8
The categories of this paper are: hep-ex
33
The categories of this paper are: plasm-ph