Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Capacitance and compressibility of heterostructures with strong
  electronic correlations   Strong electronic correlations related to a repulsive local interaction
suppress the electronic compressibility in a single-band model, and the
capacitance of a corresponding metallic film is directly related to its
electronic compressibility. Both statements may be altered significantly when
two extensions to the system are implemented which we investigate here: (i) we
introduce an attractive nearest-neighbor interaction $V$ as antagonist to the
repulsive on-site repulsion $U$, and (ii) we consider nano-structured
multilayers (heterostructures) assembled from two-dimensional layers of these
systems. We determine the respective total compressibility $\kappa$ and
capacitance $C$ of the heterostructures within a strong coupling evaluation,
which builds on a Kotliar-Ruckenstein slave-boson technique. Whereas the
capacitance $C(n)$ for electronic densities $n$ close to half-filling is
suppressed---illustrated by a correlation induced dip in $C(n)$---it may be
appreciably enhanced close to a van Hove singularity. Moreover, we show that
the capacitance may be a non-monotonic function of $U$ close to half-filling
for both attractive and repulsive $V$. The compressibility $\kappa$ can differ
from $C$ substantially, as $\kappa$ is very sensitive to internal electrostatic
energies which in turn depend on the specific set-up of the heterostructure. In
particular, we show that a capacitor with a polar dielectric has a smaller
electronic compressibility and is more stable against phase separation than a
standard non-polar capacitor with the same capacitance.

16
The categories of this paper are: stat
20
The categories of this paper are: acc-phys
2
The categories of this paper are: math
27
The categories of this paper are: comp-gas
15
The categories of this paper are: nucl-ex
17
The categories of this paper are: q-fin
26
The categories of this paper are: bayes-an
11
The categories of this paper are: hep-lat
35
The categories of this paper are: mtrl-th
9
The categories of this paper are: nlin
25
The categories of this paper are: patt-sol
30
The categories of this paper are: q-alg
21
The categories of this paper are: adap-org
7
The categories of this paper are: hep-th
29
The categories of this paper are: funct-an
33
The categories of this paper are: plasm-ph