Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: $Ab$-$initio$ electronic structure, optical and magneto-optical
  properties of $MnGaAs$ digital ferromagnetic heterostructures   We report on a theoretical study of the electronic, optical and
magneto-optical properties of digital ferromagnetic hetero-structures based on
$Mn$ $\delta$--doped $GaAs$. We consider different structures corresponding to
$Mn$ contents within the range 12-50\% and we study how the system changes as a
function of the doping concentration. Our first--principles approach includes
the spin-orbit interaction in a fully relativistic pseudopotential scheme and
the local fields effect in the description of the optical absorption. We show
that $Mn$ $\delta$-doped $GaAs$ shares many properties with the uniformly doped
$Ga_{1-x}Mn_xAs$ system, i.e. half-metallicity, similar absorption spectra, and
moderate Kerr rotation angles in the visible spectral region.

37
The categories of this paper are: supr-con
11
The categories of this paper are: hep-lat
13
The categories of this paper are: quant-ph
22
The categories of this paper are: chao-dyn
24
The categories of this paper are: dg-ga
12
The categories of this paper are: nucl-th
5
The categories of this paper are: gr-qc
35
The categories of this paper are: mtrl-th
31
The categories of this paper are: ao-sci
25
The categories of this paper are: patt-sol
0
The categories of this paper are: hep-ph
21
The categories of this paper are: adap-org
10
The categories of this paper are: q-bio
18
The categories of this paper are: econ
15
The categories of this paper are: nucl-ex
26
The categories of this paper are: bayes-an