Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Ab Initio calculation of field emission from metal surfaces with
  atomic--scale defects   In this work we combine density functional theory and quantum transport
calculations to study the influence of atomic--scale defects on the work
function and field emission characteristics of metal surfaces. We develop a
general methodology for the calculation of the field emitted current density
from nano-featured surfaces, which is then used to study specific defects on a
Cu(111) surface. Our results show that the inclusion of a defect can
significantly locally enhance the field emitted current density. However, this
increase is attributed solely to the decrease of the work function due to the
defect, with the effective field enhancement being minute. Finally, the
Fowler--Nordheim equation is found to be valid when the modified value for the
work function is used, with only an approximately constant factor separating
the computed currents from those predicted by the Fowler--Nordheim equation.

23
The categories of this paper are: solv-int
32
The categories of this paper are: atom-ph
20
The categories of this paper are: acc-phys
37
The categories of this paper are: supr-con
14
The categories of this paper are: math-ph
29
The categories of this paper are: funct-an
31
The categories of this paper are: ao-sci
9
The categories of this paper are: nlin
7
The categories of this paper are: hep-th
5
The categories of this paper are: gr-qc
24
The categories of this paper are: dg-ga
10
The categories of this paper are: q-bio
16
The categories of this paper are: stat
35
The categories of this paper are: mtrl-th
2
The categories of this paper are: math
19
The categories of this paper are: eess