Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: New non-Fermi liquid type behavior given by a two-band system in normal
  phase   We are reporting a new non-Fermi liquid type normal phase that has a well
defined Fermi energy, but without showing any non-regularity in the momentum
distribution function in the whole momentum space, the sharp Fermi momentum
concept being undefinable. The system contains a natural built in gap that is
visible in the physical properties of the system at nonzero temperatures. The
presence of a flat band in multiband interacting Fermi systems with more than
half filling is the key feature leading to such a ground state, which is not
restricted to one spatial dimension and emerges in the proximity of an
insulating phase.

30
The categories of this paper are: q-alg
29
The categories of this paper are: funct-an
19
The categories of this paper are: eess
0
The categories of this paper are: hep-ph
25
The categories of this paper are: patt-sol
22
The categories of this paper are: chao-dyn
13
The categories of this paper are: quant-ph
5
The categories of this paper are: gr-qc
26
The categories of this paper are: bayes-an
36
The categories of this paper are: cmp-lg
21
The categories of this paper are: adap-org
24
The categories of this paper are: dg-ga
32
The categories of this paper are: atom-ph
17
The categories of this paper are: q-fin
23
The categories of this paper are: solv-int
31
The categories of this paper are: ao-sci