Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Electronic and magnetic properties of the (001) surface of hole-doped
  manganites   The electronic and magnetic properties of ferromagnetic doped manganites are
investigated by means of model tight-binding and \textit{ab initio}
self-interaction corrected local spin density approximation calculations. It is
found that the surface alone by breaking the cubic symmetry induces a
difference in the occupation of the two $e_{g}$ orbitals at the surface. With
\textit{ab initio} calculations we found surface localisation of one orbital
and hence a change in the Mn valency from four in the bulk to three at the
sub-surface. Different surface or disordered interface induced localisation of
the orbitals are considered too with respect to the nature and the strength of
the magnetic exchange coupling between the surface/interface and the bulk-like
region.

7
The categories of this paper are: hep-th
19
The categories of this paper are: eess
5
The categories of this paper are: gr-qc
27
The categories of this paper are: comp-gas
36
The categories of this paper are: cmp-lg
20
The categories of this paper are: acc-phys
26
The categories of this paper are: bayes-an
6
The categories of this paper are: astro-ph
3
The categories of this paper are: physics
11
The categories of this paper are: hep-lat
17
The categories of this paper are: q-fin
25
The categories of this paper are: patt-sol
0
The categories of this paper are: hep-ph
10
The categories of this paper are: q-bio
18
The categories of this paper are: econ
2
The categories of this paper are: math