Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Electronic bands of III-V semiconductor polytypes and their alignment   The quasiparticle band structures of four polytypes 3C, 6H, 4H, and 2H of
GaP, GaAs, GaSb, InP, InAs, and InSb are computed with high accuracy including
spin-orbit interaction applying a recently developed approximate calculation
scheme, the LDA-1/2 method. The results are used to derive band offsets
  $\Delta E_c$ and $\Delta E_v$ for the conduction and valence bands between
two polytypes. The alignment of the band structures is based on the
branch-point energy
  $E_{\rm BP}$ for each polytype. The aligned electronic structures are used to
explain properties of heterocrystalline but homomaterial junctions.
  The gaps and offsets allow to discuss spectroscopic results obtained recently
for such junctions in III-V nanowires.

3
The categories of this paper are: physics
36
The categories of this paper are: cmp-lg
1
The categories of this paper are: cs
29
The categories of this paper are: funct-an
21
The categories of this paper are: adap-org
30
The categories of this paper are: q-alg
13
The categories of this paper are: quant-ph
26
The categories of this paper are: bayes-an
17
The categories of this paper are: q-fin
28
The categories of this paper are: alg-geom
7
The categories of this paper are: hep-th
14
The categories of this paper are: math-ph
22
The categories of this paper are: chao-dyn
33
The categories of this paper are: plasm-ph
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The categories of this paper are: gr-qc
2
The categories of this paper are: math