Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Emergence of Nearly Flat Bands through an Embedded Kagome Lattice in an
  Epitaxial Two-dimensional Ge Layer on ZrB2(0001)   Ge atoms segregating on zirconium diboride thin films grown on Ge(111) were
found to crystallize into a two-dimensional bitriangular structure which was
recently predicted to be a flat band material. Angle-resolved photoemission
experiments together with theoretical calculations verified the existence of a
nearly flat band in spite of non-negligible in-plane long-range hopping and
interactions with the substrate. This provides the first experimental evidence
that a flat band can emerge from the electronic coupling between atoms and not
from the geometry of the atomic structure.

34
The categories of this paper are: chem-ph
6
The categories of this paper are: astro-ph
16
The categories of this paper are: stat
11
The categories of this paper are: hep-lat
26
The categories of this paper are: bayes-an
15
The categories of this paper are: nucl-ex
10
The categories of this paper are: q-bio
31
The categories of this paper are: ao-sci
35
The categories of this paper are: mtrl-th
3
The categories of this paper are: physics
37
The categories of this paper are: supr-con
28
The categories of this paper are: alg-geom
22
The categories of this paper are: chao-dyn
14
The categories of this paper are: math-ph
7
The categories of this paper are: hep-th
0
The categories of this paper are: hep-ph