Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Ab initio investigation of FeAs/GaAs heterostructures for potential
  spintronic and superconducting applications   Ultra-thin FeAs is of interest both as the active component in the newly
identified pnictide superconductors, and in spintronic applications at the
interface between ferromagnetic Fe and semiconducting GaAs. Here we use
first-principles density functional theory to investigate the properties of
FeAs/GaAs heterostructures. We find that the Fermi surface is modified from
that characteristic of the pnictide superconductors by interactions between the
FeAs layer and the As atoms in the GaAs layers. Regardless of the number of
FeAs layers, the Fe to As ratio, or the strain state, the lowest energy
magnetic ordering is always antiferromagnetic, suggesting that such
heterostructures are not promising spintronic systems, and offering an
explanation for the failure of spin injection across Fe/GaAs interfaces.

9
The categories of this paper are: nlin
26
The categories of this paper are: bayes-an
21
The categories of this paper are: adap-org
13
The categories of this paper are: quant-ph
6
The categories of this paper are: astro-ph
24
The categories of this paper are: dg-ga
32
The categories of this paper are: atom-ph
12
The categories of this paper are: nucl-th
27
The categories of this paper are: comp-gas
33
The categories of this paper are: plasm-ph
17
The categories of this paper are: q-fin
34
The categories of this paper are: chem-ph
22
The categories of this paper are: chao-dyn
36
The categories of this paper are: cmp-lg
3
The categories of this paper are: physics
10
The categories of this paper are: q-bio