Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quantum capacitance and compressibility of graphene: The role of Coulomb
  interactions   Many-body effects on quantum capacitance, compressibility, renormalized Fermi
velocity, kinetic and interaction energies of massless Dirac electrons in
graphene, induced by the Coulomb interactions, are analyzed theoretically in
the first-order, Hartree-Fock and random phase approximations. Recent
experimental data on quantum capacitance and renormalized Fermi velocity are
analyzed and compared with the theory. The bare Fermi velocity and the
effective dielectric constants are obtained from the experimental data. A
combined effect of Coulomb interactions and Gaussian fluctuations of disorder
potential is considered.

13
The categories of this paper are: quant-ph
27
The categories of this paper are: comp-gas
35
The categories of this paper are: mtrl-th
16
The categories of this paper are: stat
22
The categories of this paper are: chao-dyn
25
The categories of this paper are: patt-sol
8
The categories of this paper are: hep-ex
9
The categories of this paper are: nlin
20
The categories of this paper are: acc-phys
18
The categories of this paper are: econ
6
The categories of this paper are: astro-ph
23
The categories of this paper are: solv-int
31
The categories of this paper are: ao-sci
19
The categories of this paper are: eess
12
The categories of this paper are: nucl-th
1
The categories of this paper are: cs