Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Impossibility of Increasing N$\acute{\textrm{e}}$el Temperature in
  Zigzag Graphene Nanoribbon by Electric Field and Carrier Doping   We investigated the dependence of N$\acute{\textrm{e}}$el temperature as a
critical temperature on the electric field and hole-electron doping in the
antiferromagnetically ordered zigzag graphene nanoribbon. The temperature was
calculated by averaging the magnon energy in the Brillouin zone within the
mean-field approximation. We employed the generalized Bloch theorem instead of
the supercell approach to reduce the computational cost significantly to obtain
the magnon spectrum. We showed that the N$\acute{\textrm{e}}$el temperature
reduces when increasing both the electric field and the hole-electron doping,
thus these treatments will never enhance the N$\acute{\textrm{e}}$el
temperature.

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The categories of this paper are: nlin
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The categories of this paper are: hep-ex
3
The categories of this paper are: physics
31
The categories of this paper are: ao-sci
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The categories of this paper are: stat
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The categories of this paper are: hep-th
26
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: quant-ph
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The categories of this paper are: q-bio
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The categories of this paper are: comp-gas
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The categories of this paper are: acc-phys
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The categories of this paper are: nucl-ex
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The categories of this paper are: cmp-lg
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The categories of this paper are: nucl-th
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The categories of this paper are: q-alg