Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Effect of wetting layers on the strain and electronic structure of InAs
  self-assembled quantum dots   The effect of wetting layers on the strain and electronic structure of InAs
self-assembled quantum dots grown on GaAs is investigated with an atomistic
valence-force-field model and an empirical tight-binding model. By comparing a
dot with and without a wetting layer, we find that the inclusion of the wetting
layer weakens the strain inside the dot by only 1% relative change, while it
reduces the energy gap between a confined electron and hole level by as much as
10%. The small change in the strain distribution indicates that strain relaxes
only little through the thin wetting layer. The large reduction of the energy
gap is attributed to the increase of the confining-potential width rather than
the change of the potential height. First-order perturbation calculations or,
alternatively, the addition of an InAs disk below the quantum dot confirm this
conclusion. The effect of the wetting layer on the wave function is
qualitatively different for the weakly confined electron state and the strongly
confined hole state. The electron wave function shifts from the buffer to the
wetting layer, while the hole shifts from the dot to the wetting layer.

0
The categories of this paper are: hep-ph
36
The categories of this paper are: cmp-lg
9
The categories of this paper are: nlin
16
The categories of this paper are: stat
22
The categories of this paper are: chao-dyn
21
The categories of this paper are: adap-org
6
The categories of this paper are: astro-ph
8
The categories of this paper are: hep-ex
33
The categories of this paper are: plasm-ph
11
The categories of this paper are: hep-lat
19
The categories of this paper are: eess
34
The categories of this paper are: chem-ph
37
The categories of this paper are: supr-con
30
The categories of this paper are: q-alg
5
The categories of this paper are: gr-qc
13
The categories of this paper are: quant-ph