Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Magnetic interactions in FeSe studied by first principle calculations   Based on first principle calculations we have investigated the evolution of
magnetism in free-standing monolayer FeSe with respect to lattice constant and
magnetism in bulk FeSe. The computational results show that the magnetic order
in free-standing monolayer FeSe will change from anti-ferromagnetic
pair-checkboard order to stripe collinear order along with enlarging lattice
constant. The magnetic order in bulk FeSe will change from stripe collinear
order to anti-ferromagnetic pair-checkboard order only if structure
reconstruction is allowed. We use J$_1$-J$_2$-K$_1$ model to fit the calculated
total energies of different magnetic orders to study magnetic interaction
strengths in FeSe. The fitting results of J$_1$-J$_2$-K$_1$ indicate that
magnetic interactions in FeSe are quite strong and highly frustrated, and
increase slowly with enlarging lattice parameter.

37
The categories of this paper are: supr-con
16
The categories of this paper are: stat
9
The categories of this paper are: nlin
29
The categories of this paper are: funct-an
17
The categories of this paper are: q-fin
15
The categories of this paper are: nucl-ex
18
The categories of this paper are: econ
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The categories of this paper are: chem-ph
2
The categories of this paper are: math
8
The categories of this paper are: hep-ex
23
The categories of this paper are: solv-int
21
The categories of this paper are: adap-org
1
The categories of this paper are: cs
26
The categories of this paper are: bayes-an
31
The categories of this paper are: ao-sci
3
The categories of this paper are: physics