Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Emergent topological phenomena in thin films of pyrochlore iridates   Two quintessential ingredients governing the topological invariant of a
system are the dimensionality and the symmetry of the system. Due to the recent
development of thin film and artificial superstructure growth technique, it is
possible to control the dimensionality of the system, smoothly between the
two-dimensions (2D) and three-dimensions (3D). In this work we unveil the
dimensional crossover of emergent topological phenomena in correlated
topological materials. In particular, by focusing on the thin film of
pyrochlore iridate antiferromagnets grown along the [111] direction, we
demonstrate that it can show giant anomalous Hall conductance, which is
proportional to the thickness of the film, even though there is no Hall effect
in 3D bulk material. In addition, we uncover the emergence of a new topological
phase, whose nontrivial topological properties are hidden in the bulk insulator
but manifest only in thin films. This shows that the thin film of topological
materials is a new platform to search for unexplored novel topological
phenomena.

13
The categories of this paper are: quant-ph
0
The categories of this paper are: hep-ph
30
The categories of this paper are: q-alg
19
The categories of this paper are: eess
12
The categories of this paper are: nucl-th
3
The categories of this paper are: physics
2
The categories of this paper are: math
37
The categories of this paper are: supr-con
24
The categories of this paper are: dg-ga
26
The categories of this paper are: bayes-an
36
The categories of this paper are: cmp-lg
18
The categories of this paper are: econ
22
The categories of this paper are: chao-dyn
29
The categories of this paper are: funct-an
10
The categories of this paper are: q-bio
34
The categories of this paper are: chem-ph