Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Band structure of twisted bilayer graphene on hexagonal boron nitride   The effect of an hexagonal boron nitride (hBN) layer close aligned with
twisted bilayer graphene (TBG) is studied. At sufficiently low angles between
twisted bilayer graphene and hBN, $\theta_{hBN} \lesssim 2^\circ$, the graphene
electronic structure is strongly disturbed. The width of the low energy peak in
the density of states changes from $W \sim 5 - 10$ meV for a decoupled system
to $\sim 20 - 30$ meV. Spikes in the density of states due to van Hove
singularities are smoothed out. We find that for a realistic combination of the
twist angle in the TBG and the twist angle between the hBN and the graphene
layer the system can be described using a single moir\'e unit cell.

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The categories of this paper are: cmp-lg
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The categories of this paper are: mtrl-th
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The categories of this paper are: hep-th
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The categories of this paper are: hep-ex
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The categories of this paper are: econ
5
The categories of this paper are: gr-qc
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The categories of this paper are: math-ph
22
The categories of this paper are: chao-dyn
15
The categories of this paper are: nucl-ex
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The categories of this paper are: solv-int
1
The categories of this paper are: cs
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The categories of this paper are: bayes-an
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The categories of this paper are: plasm-ph
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The categories of this paper are: dg-ga
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The categories of this paper are: eess
11
The categories of this paper are: hep-lat