Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Polarity-induced oxygen vacancies at LaAlO3|SrTiO3 interfaces   Using first-principles density functional theory calculations, we find a
strong position and thickness dependence of the formation energy of oxygen
vacancies in LaAlO3|SrTiO3 (LAO|STO) multilayers and interpret this with an
analytical capacitor model. Oxygen vacancies are preferentially formed at
p-type SrO|AlO2 rather than at n-type LaO|TiO2 interfaces; the excess electrons
introduced by the oxygen vacancies reduce their energy by moving to the n-type
interface. This asymmetric behavior makes an important contribution to the
conducting (insulating) nature of n-type (p-type) interfaces while providing a
natural explanation for the failure to detect evidence for the polar
catastrophe in the form of core level shifts.

17
The categories of this paper are: q-fin
33
The categories of this paper are: plasm-ph
19
The categories of this paper are: eess
23
The categories of this paper are: solv-int
34
The categories of this paper are: chem-ph
12
The categories of this paper are: nucl-th
14
The categories of this paper are: math-ph
36
The categories of this paper are: cmp-lg
7
The categories of this paper are: hep-th
20
The categories of this paper are: acc-phys
16
The categories of this paper are: stat
35
The categories of this paper are: mtrl-th
10
The categories of this paper are: q-bio
30
The categories of this paper are: q-alg
28
The categories of this paper are: alg-geom
24
The categories of this paper are: dg-ga