Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Mechanism of Magnetism in Stacked Nanographite: Theoretical Study   Antiferromagnetism in stacked nanographite is investigated with using the
Hubbard-type model. The A-B stacking is favorable for the hexagonal
nanographite with zigzag edges, in order that magnetism appears. Next, we find
that the open shell electronic structures can be origins of the decreasing
magnetic moment with the decrease of the inter-graphene distance, as
experiments on adsorption of molecules suggest.

37
The categories of this paper are: supr-con
23
The categories of this paper are: solv-int
36
The categories of this paper are: cmp-lg
2
The categories of this paper are: math
11
The categories of this paper are: hep-lat
14
The categories of this paper are: math-ph
31
The categories of this paper are: ao-sci
33
The categories of this paper are: plasm-ph
27
The categories of this paper are: comp-gas
5
The categories of this paper are: gr-qc
16
The categories of this paper are: stat
17
The categories of this paper are: q-fin
6
The categories of this paper are: astro-ph
12
The categories of this paper are: nucl-th
1
The categories of this paper are: cs
25
The categories of this paper are: patt-sol