Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: NMR parameters in gapped graphene systems   We calculate the nuclear spin-lattice relaxation time and the Knight shift
for the case of gapped graphene systems. Our calculations consider both the
massive and massless gap scenarios. Both the spin-lattice relaxation time and
the Knight shift depend on temperature, chemical potential, and the value of
the electronic energy gap. In particular, at the Dirac point, the electronic
energy gap has stronger effects on the system nuclear magnetic resonance
parameters in the case of the massless gap scenario. Differently, at large
values of the chemical potential, both gap scenarios behave in a similar way
and the gapped graphene system approaches a Fermi gas from the nuclear magnetic
resonance parameters point of view. Our results are important for nuclear
magnetic resonance measurements that target the $^{13}$C active nuclei in
graphene samples.

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The categories of this paper are: q-fin
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The categories of this paper are: q-bio
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The categories of this paper are: acc-phys
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The categories of this paper are: math-ph
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The categories of this paper are: eess
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The categories of this paper are: alg-geom
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The categories of this paper are: q-alg
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The categories of this paper are: solv-int
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The categories of this paper are: comp-gas
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The categories of this paper are: gr-qc
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The categories of this paper are: nlin
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The categories of this paper are: dg-ga
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The categories of this paper are: bayes-an
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The categories of this paper are: math
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The categories of this paper are: econ
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The categories of this paper are: funct-an