Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Rapid Thermal Annealing for Surface Optimisation of ZnO Substrates for
  MBE-Grown Oxide Two-Dimensional Electron Gases   Two-dimensional electron gases (2DEGs) at the ZnO/ZnMgO interface are
promising for applications in spintronics and quantum computing due to the
combination of low spin-orbit coupling and high electron mobility. Growing high
mobility 2DEGs requires high quality substrates with low impurity densities. In
this work we demonstrate a ZnO substrate sample treatment combining high
temperature rapid thermal annealing and chemical etching to improve the surface
quality for the subsequent growth of 2DEGs. This process enables the growth of
a 2DEG with low-temperature mobility of $4.8\times10^4$~cm$^2$V$^{-1}$s$^{-1}$.
An unannealed control sample shows a scattering rate at least three times
greater than the annealed sample.

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The categories of this paper are: acc-phys
8
The categories of this paper are: hep-ex
9
The categories of this paper are: nlin
28
The categories of this paper are: alg-geom
17
The categories of this paper are: q-fin
31
The categories of this paper are: ao-sci
15
The categories of this paper are: nucl-ex
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The categories of this paper are: solv-int
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The categories of this paper are: econ
35
The categories of this paper are: mtrl-th
2
The categories of this paper are: math
26
The categories of this paper are: bayes-an
30
The categories of this paper are: q-alg
37
The categories of this paper are: supr-con
32
The categories of this paper are: atom-ph
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The categories of this paper are: adap-org