Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Prediction of a surface state and a related surface insulator-metal
  transition for the (100) surface of stochiometric EuO   We calculate the temperature and layer-dependent electronic structure of a
20-layer EuO(100)-film using a combination of first-principles and model
calculation based on the ferromagnetic Kondo-lattice model. The results suggest
the existence of a EuO(100) surface state which can lead to a surface
insulator-metal transition.

5
The categories of this paper are: gr-qc
2
The categories of this paper are: math
23
The categories of this paper are: solv-int
30
The categories of this paper are: q-alg
9
The categories of this paper are: nlin
33
The categories of this paper are: plasm-ph
10
The categories of this paper are: q-bio
3
The categories of this paper are: physics
13
The categories of this paper are: quant-ph
17
The categories of this paper are: q-fin
27
The categories of this paper are: comp-gas
18
The categories of this paper are: econ
11
The categories of this paper are: hep-lat
34
The categories of this paper are: chem-ph
37
The categories of this paper are: supr-con
12
The categories of this paper are: nucl-th