Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: First-principles study of FeSe epitaxial films on SrTiO3   The discovery of high temperature superconductivity in FeSe films on SrTiO3
substrate has inspired great experimental and theoretical interests.
First-principles density functional theory calculations, which have played an
important role in the study of bulk iron-based superconductors, also
participate in the investigation of interfacial superconductivity. In this
article, we review the calculation results on the electronic and magnetic
structures of FeSe epitaxial films, emphasizing on the interplay between
different degrees of freedom, such as charge, spin, and lattice vibrations.
Furthermore, the comparison between FeSe monolayer and bilayer films on SrTiO3
is discussed.

17
The categories of this paper are: q-fin
27
The categories of this paper are: comp-gas
18
The categories of this paper are: econ
6
The categories of this paper are: astro-ph
20
The categories of this paper are: acc-phys
30
The categories of this paper are: q-alg
16
The categories of this paper are: stat
9
The categories of this paper are: nlin
32
The categories of this paper are: atom-ph
14
The categories of this paper are: math-ph
5
The categories of this paper are: gr-qc
3
The categories of this paper are: physics
1
The categories of this paper are: cs
29
The categories of this paper are: funct-an
19
The categories of this paper are: eess
31
The categories of this paper are: ao-sci