Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Effective mass at the surface of a Fermi liquid   Using the dynamical mean-field theory, we calculate the effective electron
mass in the Hubbard model on a semi-infinite lattice. At the surface the
effective mass is strongly enhanced. Near half-filling this gives rise to a
correlation-driven one-electron surface mode.

27
The categories of this paper are: comp-gas
35
The categories of this paper are: mtrl-th
2
The categories of this paper are: math
12
The categories of this paper are: nucl-th
32
The categories of this paper are: atom-ph
28
The categories of this paper are: alg-geom
23
The categories of this paper are: solv-int
1
The categories of this paper are: cs
33
The categories of this paper are: plasm-ph
10
The categories of this paper are: q-bio
15
The categories of this paper are: nucl-ex
16
The categories of this paper are: stat
34
The categories of this paper are: chem-ph
21
The categories of this paper are: adap-org
3
The categories of this paper are: physics
36
The categories of this paper are: cmp-lg