Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Electric field driven octahedral rotation in perovskite   Rotation of MO6 (M = transition metal) octahedra is a key determinant of the
physical properties of perovskite materials. Therefore, tuning physical
properties, one of the most important goals in condensed matter research, may
be accomplished by controlling octahedral rotation (OR). In this study, it is
demonstrated that OR can be driven by an electric field in Sr$_2$RuO$_4$.
Rotated octahedra in the surface layer of Sr$_2$RuO$_4$ are restored to the
unrotated bulk structure upon dosing the surface with K. Theoretical
investigation shows that OR in Sr$_2$RuO$_4$ originates from the surface
electric field, which can be tuned via the screening effect of the overlaid K
layer. This work establishes not only that variation in the OR angle can be
induced by an electric field, but also provides a way to control OR, which is
an important step towards in situ control of the physical properties of
perovskite oxides.

21
The categories of this paper are: adap-org
13
The categories of this paper are: quant-ph
23
The categories of this paper are: solv-int
16
The categories of this paper are: stat
18
The categories of this paper are: econ
8
The categories of this paper are: hep-ex
31
The categories of this paper are: ao-sci
36
The categories of this paper are: cmp-lg
15
The categories of this paper are: nucl-ex
1
The categories of this paper are: cs
27
The categories of this paper are: comp-gas
7
The categories of this paper are: hep-th
30
The categories of this paper are: q-alg
22
The categories of this paper are: chao-dyn
32
The categories of this paper are: atom-ph
2
The categories of this paper are: math