Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Spin-accumulation and Andreev-reflection in a mesoscopic ferromagnetic
  wire   The electron transport though ferromagnetic metal-superconducting hybrid
devices is considered in the non-equilibrium Green's function formalism in the
quasiclassical approximation. Attention if focused on the limit in which the
exchange splitting in the ferromagnet is much larger than the superconducting
energy gap. Transport properties are then governed by an interplay between
spin-accumulation close to the interface and Andreev reflection at the
interface. We find that the resistance can either be enhanced or lowered in
comparison to the normal case and can have a non-monotonic temperature and
voltage dependence. In the non-linear voltage regime electron heating effects
may govern the transport properties, leading to qualitative different behaviour
than in the absence of heating effects. Recent experimental results on the
effect of the superconductor on the conductance of the ferromagnet can be
understood by our results for the energy-dependent interface resistance
together with effects of spin- accumulation without invoking long range pairing
correlations in the ferromagnet.

29
The categories of this paper are: funct-an
9
The categories of this paper are: nlin
18
The categories of this paper are: econ
36
The categories of this paper are: cmp-lg
11
The categories of this paper are: hep-lat
30
The categories of this paper are: q-alg
26
The categories of this paper are: bayes-an
21
The categories of this paper are: adap-org
28
The categories of this paper are: alg-geom
3
The categories of this paper are: physics
24
The categories of this paper are: dg-ga
35
The categories of this paper are: mtrl-th
17
The categories of this paper are: q-fin
23
The categories of this paper are: solv-int
0
The categories of this paper are: hep-ph
14
The categories of this paper are: math-ph