Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quasiparticle Calculations for Point Defects on Semiconductor Surfaces   We discuss the implementation of quasiparticle calculations for point defects
on semiconductor surfaces and, as a specific example, present an ab initio
study of the electronic structure of the As vacancy in the +1 charge state on
the GaAs(110) surface. The structural properties are calculated with the
plane-wave pseudopotential method, and the quasiparticle energies are obtained
from Hedin's GW approximation. Our calculations show that the 1a" vacancy state
in the band gap is shifted from 0.06 to 0.65 eV above the valence-band maximum
after the self-energy correction to the Kohn-Sham eigenvalues. The GW result is
in close agreement with a recent surface photovoltage imaging measurement.

37
The categories of this paper are: supr-con
16
The categories of this paper are: stat
25
The categories of this paper are: patt-sol
35
The categories of this paper are: mtrl-th
14
The categories of this paper are: math-ph
32
The categories of this paper are: atom-ph
26
The categories of this paper are: bayes-an
18
The categories of this paper are: econ
11
The categories of this paper are: hep-lat
22
The categories of this paper are: chao-dyn
3
The categories of this paper are: physics
31
The categories of this paper are: ao-sci
7
The categories of this paper are: hep-th
5
The categories of this paper are: gr-qc
13
The categories of this paper are: quant-ph
1
The categories of this paper are: cs