Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Dimensionality Control of d-orbital Occupation in Oxide Superlattices   Manipulating the orbital state in a strongly correlated electron system is of
fundamental and technological importance for exploring and developing novel
electronic phases. Here, we report an unambiguous demonstration of orbital
occupancy control between t2g and eg multiplets in quasi-twodimensional
transition metal oxide superlattices (SLs) composed of a Mott insulator LaCoO3
and a band insulator LaAlO3. As the LaCoO3 sublayer thickness approaches its
fundamental limit (i.e. one unit-cell-thick), the electronic state of the SLs
changed from a Mott insulator, in which both t2g and eg orbitals are partially
filled, to a band insulator by completely filling (emptying) the t2g (eg)
orbitals. We found the reduction of dimensionality has a profound effect on the
electronic structure evolution, which is, whereas, insensitive to the epitaxial
strain. The remarkable orbital controllability shown here offers a promising
pathway for novel applications such as catalysis and photovoltaics, where the
energy of d level is an essential parameter.

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The categories of this paper are: astro-ph
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The categories of this paper are: solv-int
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The categories of this paper are: acc-phys
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The categories of this paper are: eess
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The categories of this paper are: physics
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The categories of this paper are: gr-qc
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The categories of this paper are: adap-org
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The categories of this paper are: alg-geom
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The categories of this paper are: econ
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The categories of this paper are: math
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The categories of this paper are: dg-ga
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The categories of this paper are: hep-th
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The categories of this paper are: math-ph
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The categories of this paper are: chao-dyn
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The categories of this paper are: comp-gas
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The categories of this paper are: quant-ph