Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Phenomenology of Andreev reflection from first-principles transport
  theory   We study Andreev reflection in normal metal-superconductor junctions by using
an extended Blonder-Tinkham-Klapwijk model combined with transport calculations
based on density functional theory. Starting from a parameter-free description
of the underlying electronic structure, we perform a detailed investigation of
normal metal-superconductor junctions, as the separation between the
superconductor and the normal metal is varied. The results are interpreted by
means of transverse momentum resolved calculations, which allow us to examine
the contributions arising from different regions of the Brillouin zone.
Furthermore we investigate the effect of a voltage bias on the normal
metal-superconductor conductance spectra. Finally, we consider Andreev
reflection in carbon nanotubes sandwiched between normal and superconducting
electrodes.

35
The categories of this paper are: mtrl-th
25
The categories of this paper are: patt-sol
28
The categories of this paper are: alg-geom
2
The categories of this paper are: math
14
The categories of this paper are: math-ph
24
The categories of this paper are: dg-ga
29
The categories of this paper are: funct-an
18
The categories of this paper are: econ
12
The categories of this paper are: nucl-th
20
The categories of this paper are: acc-phys
1
The categories of this paper are: cs
5
The categories of this paper are: gr-qc
31
The categories of this paper are: ao-sci
13
The categories of this paper are: quant-ph
6
The categories of this paper are: astro-ph
7
The categories of this paper are: hep-th