Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: MultiShifter: software to generate structural models of extended
  two-dimensional defects in 3D and 2D crystals   Extended defects in crystals, such as dislocations, stacking faults and grain
boundaries, play a crucial role in determining a wide variety of materials
properties. Extended defects can also lead to novel electronic properties in
two-dimensional materials, as demonstrated by recent discoveries of emergent
electronic phenomena in twisted graphene bilayers. This paper describes several
approaches to construct crystallographic models of two-dimensional extended
defects in crystals for first-principles electronic structure calculations,
including (i) crystallographic models to parameterize generalized cohesive zone
models for fracture studies and meso-scale models of dislocations and (ii)
crystallographic models of twisted bilayers. The approaches are implemented in
an open source software package called MultiShifter.

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The categories of this paper are: stat
36
The categories of this paper are: cmp-lg
5
The categories of this paper are: gr-qc
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The categories of this paper are: quant-ph
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The categories of this paper are: hep-lat
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The categories of this paper are: nucl-ex
2
The categories of this paper are: math
12
The categories of this paper are: nucl-th
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The categories of this paper are: q-fin
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The categories of this paper are: funct-an
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The categories of this paper are: q-alg
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The categories of this paper are: bayes-an
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The categories of this paper are: math-ph
18
The categories of this paper are: econ
35
The categories of this paper are: mtrl-th
10
The categories of this paper are: q-bio