Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Cross-sectional imaging of sharp Si interlayers embedded in gallium
  arsenide   We investigate the electronic properties of the (110) cross-sectional surface
of Si-doped GaAs using first-principles techniques. We focus on doping
configurations with an equal concentration of Si impurities in cationic and
anionic sites, such as occurring in a self-compensating doping regime. In
particular we study a bilayer of Si atoms uniformly distributed over two
consecutive (001) atomic layers. The simulated cross-sectional scanning
tunneling microscopy images show a bright signal at negative bias, which is
strongly attenuated when the bias is reversed. This scenario is consistent with
experimental results which had been attributed to hitherto unidentified Si
complexes.

31
The categories of this paper are: ao-sci
29
The categories of this paper are: funct-an
21
The categories of this paper are: adap-org
27
The categories of this paper are: comp-gas
34
The categories of this paper are: chem-ph
9
The categories of this paper are: nlin
24
The categories of this paper are: dg-ga
28
The categories of this paper are: alg-geom
30
The categories of this paper are: q-alg
26
The categories of this paper are: bayes-an
5
The categories of this paper are: gr-qc
35
The categories of this paper are: mtrl-th
22
The categories of this paper are: chao-dyn
2
The categories of this paper are: math
37
The categories of this paper are: supr-con
20
The categories of this paper are: acc-phys