Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Well-Ordered In Adatoms at the In$_2$O$_3$(111) Surface Created by Fe
  Deposition   Metal deposition on oxide surfaces usually results in adatoms, clusters, or
islands of the deposited material, where defects in the surface often act as
nucleation centers. Here an alternate configuration is reported. After the
vapor deposition of Fe on the In$_2$O$_3$(111) surface at room temperature,
ordered adatoms are observed with scanning tunneling microscopy. These are
identical to the In adatoms that form when the sample is reduced by heating in
ultrahigh vacuum. Density functional theory (DFT) calculations confirm that Fe
interchanges with In in the topmost layer, pushing the excess In atoms to the
surface where they arrange as a well-ordered adatom array.

22
The categories of this paper are: chao-dyn
16
The categories of this paper are: stat
19
The categories of this paper are: eess
7
The categories of this paper are: hep-th
37
The categories of this paper are: supr-con
13
The categories of this paper are: quant-ph
0
The categories of this paper are: hep-ph
9
The categories of this paper are: nlin
6
The categories of this paper are: astro-ph
26
The categories of this paper are: bayes-an
31
The categories of this paper are: ao-sci
23
The categories of this paper are: solv-int
15
The categories of this paper are: nucl-ex
1
The categories of this paper are: cs
29
The categories of this paper are: funct-an
25
The categories of this paper are: patt-sol