Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Large band offset as driving force of 2-dimensional electron
  confinement: the case of SrTiO$_3$/SrZrO$_3$ interface   Using advanced first-principles calculations we predict that the non-polar
SrTiO$_3$/SrZrO$_3$ (001) interface, designed as either thin SrZrO$_3$ film
deposited on SrTiO$_3$ or short-period (SrTiO$_3$)$_m$/(SrZrO$_3$)$_n$
superlattice, host a 2-dimensionally confined electron gas. Mobile electron
charge due to native impurities, field-effect, or modulation doping remains
tightly trapped at the interface. Key ingredients for this occurrence are a)
the peculiar chemistry of 3d orbitals, b) the large band offset at
titanate-zirconate interface.

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The categories of this paper are: quant-ph
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The categories of this paper are: q-bio
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The categories of this paper are: hep-lat
20
The categories of this paper are: acc-phys
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The categories of this paper are: astro-ph
15
The categories of this paper are: nucl-ex
3
The categories of this paper are: physics
28
The categories of this paper are: alg-geom
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The categories of this paper are: funct-an
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The categories of this paper are: stat
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The categories of this paper are: nucl-th
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The categories of this paper are: cs
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The categories of this paper are: hep-ph
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The categories of this paper are: bayes-an
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The categories of this paper are: eess
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The categories of this paper are: supr-con