Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Boundary conditions and Green function approach of the spin-orbit
  interaction in the graphitic nanocone   The boundary effects affecting the Hamiltonian for the nanocone with
curvatureinduced spin orbit coupling were considered and the corresponding
electronic structure was calculated. These boundary effects include the spin
orbit coupling, the electron mass acquisition and the Coulomb interaction.
Different numbers of the pentagonal defects in the tip were considered. The
Green function approach into the second order was used for getting more precise
results in the case of the spin orbit coupling.

21
The categories of this paper are: adap-org
16
The categories of this paper are: stat
34
The categories of this paper are: chem-ph
15
The categories of this paper are: nucl-ex
23
The categories of this paper are: solv-int
33
The categories of this paper are: plasm-ph
8
The categories of this paper are: hep-ex
0
The categories of this paper are: hep-ph
24
The categories of this paper are: dg-ga
29
The categories of this paper are: funct-an
37
The categories of this paper are: supr-con
10
The categories of this paper are: q-bio
14
The categories of this paper are: math-ph
36
The categories of this paper are: cmp-lg
1
The categories of this paper are: cs
20
The categories of this paper are: acc-phys