Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quantum confinement in perovskite oxide heterostructures: tight binding
  instead of nearly free electron picture   Most recently, orbital-selective quantum well states of $d$ electrons have
been experimentally observed in SrVO$_3$ ultrathin films [K. Yoshimatsu et.
al., Science 333, 319 (2011)] and SrTiO$_3$ surfaces [A. F. Santander-Syro et.
al., Nature 469, 189 (2011)]. Hitherto, one tries to explain these experiments
by a nearly free electron (NFE) model, an approach widely used for delocalized
electrons in semiconductor heterostructures and simple metal films. We show
that a tight binding (TB) model is more suitable for describing
heterostructures with more localized $d$ electrons. In this paper, we construct
from first principles simple TB models for perovskite oxide heterostructures
and surfaces. We show that the TB model provides a simple intuitive physical
picture and yields, already with only two parameters, quantitatively much more
reliable results, consistent with experiment.

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The categories of this paper are: funct-an
35
The categories of this paper are: mtrl-th
11
The categories of this paper are: hep-lat
1
The categories of this paper are: cs
6
The categories of this paper are: astro-ph
16
The categories of this paper are: stat
33
The categories of this paper are: plasm-ph
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The categories of this paper are: comp-gas
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The categories of this paper are: q-alg
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The categories of this paper are: chem-ph
25
The categories of this paper are: patt-sol
21
The categories of this paper are: adap-org
9
The categories of this paper are: nlin
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The categories of this paper are: quant-ph
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The categories of this paper are: econ
7
The categories of this paper are: hep-th