Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Electronic and magnetic properties of the graphene/Eu/Ni(111) hybrid
  system   The electronic and magnetic properties of the graphene/Eu/Ni(111)
intercalation-like system are studied in the framework of the GGA+U approach
with dispersive interactions taken into account. Intercalation of monoatomic Eu
layer underneath graphene on Ni(111) leads to the drastic changes of the
electronic structure of graphene compared to free-standing graphene as well as
graphene/Ni(111). The strong influence of the spin-polarised Eu 4f states,
crossing the graphene-derived $\pi$ states, on magnetic properties of graphene
and on spin-filtering properties of the graphene/Eu/Ni(111) trilayer is
discussed.

16
The categories of this paper are: stat
35
The categories of this paper are: mtrl-th
3
The categories of this paper are: physics
34
The categories of this paper are: chem-ph
37
The categories of this paper are: supr-con
27
The categories of this paper are: comp-gas
17
The categories of this paper are: q-fin
25
The categories of this paper are: patt-sol
29
The categories of this paper are: funct-an
5
The categories of this paper are: gr-qc
7
The categories of this paper are: hep-th
22
The categories of this paper are: chao-dyn
31
The categories of this paper are: ao-sci
20
The categories of this paper are: acc-phys
15
The categories of this paper are: nucl-ex
30
The categories of this paper are: q-alg