Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Fundamental asymmetry in interfacial electronic reconstruction between
  insulating oxides   We present an ab initio study of the (001) interfaces between two insulating
perovskites, the polar LaAlO3 and the nonpolar SrTiO3. We observe an
insulating-to-metallic transition above a critical LaAlO3 thickness. We explain
that the high conductivity observed at the TiO2 /LaO interface and the lack of
similar conductivity at the SrO/AlO2 interface are inherent in the atomic
geometry of the system. A large interfacial hopping matrix element between
cations causes the formation of a bound electron state at the TiO2 /LaO
interface. This mechanism for the formation of interfacial bound states
suggests a robust means for tuning conductivities at various oxide
heterointerfaces.

8
The categories of this paper are: hep-ex
6
The categories of this paper are: astro-ph
2
The categories of this paper are: math
1
The categories of this paper are: cs
9
The categories of this paper are: nlin
11
The categories of this paper are: hep-lat
5
The categories of this paper are: gr-qc
13
The categories of this paper are: quant-ph
18
The categories of this paper are: econ
22
The categories of this paper are: chao-dyn
25
The categories of this paper are: patt-sol
20
The categories of this paper are: acc-phys
34
The categories of this paper are: chem-ph
37
The categories of this paper are: supr-con
0
The categories of this paper are: hep-ph
15
The categories of this paper are: nucl-ex