Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Thickness dependence of the mobility at the LaAlO_3 / SrTiO_3 interface   The electronic transport properties of a series of LaAlO_3 / SrTiO_3
interfaces were investigated, and a systematic thickness dependence of the
sheet resistance and magnetoresistance was found for constant growth
conditions. This trend occurs above the critical thickness of four unit cells,
below which the LaAlO_3 / SrTiO_3 interface is not conducting. A dramatic
decrease in mobility of the electron gas of nearly two orders of magnitude was
observed with increasing LaAlO_3 thickness from five to 25 unit cells.

26
The categories of this paper are: bayes-an
19
The categories of this paper are: eess
37
The categories of this paper are: supr-con
25
The categories of this paper are: patt-sol
35
The categories of this paper are: mtrl-th
12
The categories of this paper are: nucl-th
2
The categories of this paper are: math
15
The categories of this paper are: nucl-ex
18
The categories of this paper are: econ
34
The categories of this paper are: chem-ph
28
The categories of this paper are: alg-geom
1
The categories of this paper are: cs
5
The categories of this paper are: gr-qc
29
The categories of this paper are: funct-an
8
The categories of this paper are: hep-ex
10
The categories of this paper are: q-bio