Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Strongly renormalized quasi-two-dimensional electron gas in a
  heterostructure with correlation effects   We present aspects of strong electron correlation in a model of a BI/M/BI
heterostructure where BI is a band insulator and M can be tuned from a metal to
a Mott insulator by varying the on-site repulsion. An effective one-dimensional
Schroedinger equation for the low-energy part is derived in the framework of
the Kotliar-Ruckenstein slave-boson mean-field theory and solved
self-consistently for a wide range of the on-site interaction strength and of
the width of the sandwiched material M. In the strongly interacting limit
coherent quasiparticles responsible for metallic behavior are confined to a
relatively narrow region near the interfaces where they form a
quasi-two-dimensional electron gas. Due to the lack of spatial homogeneity
these quasiparticles intrinsically obtain a nontrivial dependence on the
transverse momentum which for example enters the low-energy behavior of the
optical conductivity.

9
The categories of this paper are: nlin
7
The categories of this paper are: hep-th
14
The categories of this paper are: math-ph
2
The categories of this paper are: math
1
The categories of this paper are: cs
27
The categories of this paper are: comp-gas
13
The categories of this paper are: quant-ph
23
The categories of this paper are: solv-int
15
The categories of this paper are: nucl-ex
3
The categories of this paper are: physics
12
The categories of this paper are: nucl-th
26
The categories of this paper are: bayes-an
29
The categories of this paper are: funct-an
20
The categories of this paper are: acc-phys
5
The categories of this paper are: gr-qc
22
The categories of this paper are: chao-dyn