Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Interacting surface states of three-dimensional topological insulators   We numerically investigate the surface states of a strong topological
insulator in the presence of strong electron-electron interactions. We choose a
spherical topological insulator geometry to make the surface amenable to a
finite size analysis. The single-particle problem maps to that of Landau
orbitals on the sphere with a magnetic monopole at the center that has unit
strength and opposite sign for electrons with opposite spin. Assuming
density-density contact interactions, we find superconducting and anomalous
(quantum) Hall phases for attractive and repulsive interactions, respectively,
as well as chiral fermion and chiral Majorana fermion boundary modes between
different phases. Our setup is preeminently adapted to the search for
topologically ordered surface terminations that could be microscopically
stabilized by tailored surface interaction profiles.

7
The categories of this paper are: hep-th
19
The categories of this paper are: eess
29
The categories of this paper are: funct-an
27
The categories of this paper are: comp-gas
18
The categories of this paper are: econ
20
The categories of this paper are: acc-phys
3
The categories of this paper are: physics
15
The categories of this paper are: nucl-ex
34
The categories of this paper are: chem-ph
6
The categories of this paper are: astro-ph
22
The categories of this paper are: chao-dyn
28
The categories of this paper are: alg-geom
33
The categories of this paper are: plasm-ph
35
The categories of this paper are: mtrl-th
5
The categories of this paper are: gr-qc
24
The categories of this paper are: dg-ga