Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Theoretical Prediction on the Intrinsic Half-Metallicity in the
  Surface-Oxygen-Passivated Cr2N MXene   Two-dimensional Cr2N MXene as well as the surface-passivated Cr2NF2,
Cr2N(OH)2 and Cr2NO2 are investigated by using density functional theory. The
Cr2N is an anti-ferromagnetic metal. The F atom or OH group-passivation does
not change the anti-ferromagnetic characteristics. However, Cr2NO2 has a
ferromagnetic ground state, which is a half-metal. The half-metallicity of
Cr2NO2 is still robust when bias is applied to the nanometer sized device. The
half-metallicity is intrinsic and does not require atomically clean surfaces.
Therefore the stable surface-oxygen-passivated MXene is a good candidate for
spintronics.

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The categories of this paper are: math
9
The categories of this paper are: nlin
32
The categories of this paper are: atom-ph
3
The categories of this paper are: physics
8
The categories of this paper are: hep-ex
1
The categories of this paper are: cs
33
The categories of this paper are: plasm-ph
15
The categories of this paper are: nucl-ex
34
The categories of this paper are: chem-ph
31
The categories of this paper are: ao-sci
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The categories of this paper are: supr-con
23
The categories of this paper are: solv-int
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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: econ
5
The categories of this paper are: gr-qc