Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Cation nonstoichiometry and its impact on nucleation, structure and
  defect formation in complex oxide heteroepitaxy : LaCrO3 on SrTiO3(001)   Our ability to design and fabricate electronic devices with reproducible
properties using complex oxides is critically dependent on our ability to
controllably synthesize these materials in thin-film form. Structure-property
relationships are intimately tied to film and interface composition. Here we
report on the effects of cation stoichiometry in LaCrO3 heteroepitaxial films
prepared using molecular beam epitaxy. We show that LaCrO3 films grow
pseudomorphically on SrTiO3(001) over a wide range of La-to-Cr atom ratios.
However, the growth mode and structural quality are sensitive to the La-to-Cr
ratio, with La-rich films being of considerably lower structural quality than
Cr-rich films. Cation mixing occurs at the interface for all La-to-Cr ratios
investigated, and is not quenched by deposition at ambient temperature.
Indiffused La atoms occupy Sr sites in the substrate. The presence of defects
in the SrTiO3 substrate is implicated in promoting La indiffusion by comparing
the properties of LaCrO3/SrTiO3 with those of LaCrO3/Si, both prepared at
ambient temperature. Additionally, pulsed laser deposition is shown to result
in more extensive interfacial mixing than molecular beam epitaxy for deposition
at ambient temperature on Si.

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The categories of this paper are: nucl-ex
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The categories of this paper are: eess
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The categories of this paper are: solv-int
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The categories of this paper are: gr-qc
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The categories of this paper are: hep-ex
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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: chem-ph
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The categories of this paper are: hep-lat
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The categories of this paper are: physics
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The categories of this paper are: econ
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The categories of this paper are: q-bio
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The categories of this paper are: atom-ph
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The categories of this paper are: bayes-an
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The categories of this paper are: patt-sol