Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Conductance oscillation due to the geometrical resonance in FNS double
  junctions   We theoretically analyzed the Andreev reflection in ferromagnetic
metal/nonmagnetic metal/superconductor double junctions with special attention
to the electron interference effect in the nonmagnetic metal layer. We showed
that the conductance oscillates as a function of the bias voltage due to the
geometrical resonance. We found that the exchange field, and therefore the spin
polarization of the ferromagnetic metal can be determined from the period of
the conductance oscillation, which is proportional to the square root of the
exchange field.

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The categories of this paper are: supr-con
16
The categories of this paper are: stat
23
The categories of this paper are: solv-int
21
The categories of this paper are: adap-org
24
The categories of this paper are: dg-ga
29
The categories of this paper are: funct-an
27
The categories of this paper are: comp-gas
15
The categories of this paper are: nucl-ex
32
The categories of this paper are: atom-ph
0
The categories of this paper are: hep-ph
18
The categories of this paper are: econ
19
The categories of this paper are: eess
14
The categories of this paper are: math-ph
7
The categories of this paper are: hep-th
11
The categories of this paper are: hep-lat
13
The categories of this paper are: quant-ph