Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Zero-energy edge states and chiral symmetry breaking at edges of
  graphite sheets   Two-dimensional graphite sheets with a certain type of edges are known to
support boundary states localized near the edges. Forming a flat band with a
sharp peak in the density of states at the Fermi energy, they can trigger a
magnetic instability or a distortion of the lattice in the presence of
electron-electron or electron-phonon interactions. We shall discuss a
relationship between chiral symmetry, which is the origin of the zero-energy
edge states, and several types of induced orders such as spin density waves or
lattice distortions. We also investigate electron correlation effects on the
edge states for a wrapped quasi one-dimensional geometry, i.e., carbon
nanotube, by means of the renormalization group and the open boundary
bosonization.

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The categories of this paper are: quant-ph
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The categories of this paper are: hep-ex
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The categories of this paper are: solv-int
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The categories of this paper are: adap-org
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The categories of this paper are: hep-ph
1
The categories of this paper are: cs
18
The categories of this paper are: econ
30
The categories of this paper are: q-alg
29
The categories of this paper are: funct-an
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The categories of this paper are: math-ph
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The categories of this paper are: physics
2
The categories of this paper are: math
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The categories of this paper are: supr-con
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The categories of this paper are: hep-th
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The categories of this paper are: nlin
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The categories of this paper are: eess