Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Low-energy Electron Reflectivity from Graphene   Low-energy reflectivity of electrons from single- and multi-layer graphene is
examined both theoretically and experimentally. A series of minima in the
reflectivity over the energy range of 0 - 8 eV are found, with the number of
minima depending on the number of graphene layers. Using first-principles
computations, it is demonstrated that a free standing n-layer graphene slab
produces n-1 reflectivity minima. This same result is also found experimentally
for graphene supported on SiO2. For graphene bonded onto other substrates it is
argued that a similar series of reflectivity minima is expected, although in
certain cases an additional minimum occurs, at an energy that depends on the
graphene-substrate separation and the effective potential in that space.

36
The categories of this paper are: cmp-lg
2
The categories of this paper are: math
20
The categories of this paper are: acc-phys
14
The categories of this paper are: math-ph
1
The categories of this paper are: cs
25
The categories of this paper are: patt-sol
24
The categories of this paper are: dg-ga
10
The categories of this paper are: q-bio
15
The categories of this paper are: nucl-ex
6
The categories of this paper are: astro-ph
8
The categories of this paper are: hep-ex
31
The categories of this paper are: ao-sci
0
The categories of this paper are: hep-ph
7
The categories of this paper are: hep-th
37
The categories of this paper are: supr-con
29
The categories of this paper are: funct-an