Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Strong phonon anharmonicity and low thermal conductivity of monolayer
  tin oxides driven by lone-pair electrons   Motivated by the excellent electronic and optoelectronic properties of
two-dimensional (2D) tin oxides, we systematically investigated the thermal
conductivity of monolayer SnO and SnO2by the first-principles calculations. The
room-temperature thermal conductivity of monolayer SnO and SnO2reaches 9.6
W/(mK) and 98.8 W/(mK), respectively. The size effect is much weaker for
monolayer SnO than for monolayer SnO2, due to the coexistence of size dependent
and independent component in the thermal conductivity of monolayer SnO. The
large difference between the thermal conductivity of 2D tin oxides can be
attributed to the small phonon group velocity and strong anharmonicity strength
of monolayer SnO. Further electronic structure analysis reveals that the
existence of lone-pair Sn-5s electrons is the key factor for the small \k{appa}
of monolayer SnO. These results provide a guide for the manipulation of thermal
transport in the electronic or thermoelectric devices based on 2D tin oxides.

2
The categories of this paper are: math
9
The categories of this paper are: nlin
37
The categories of this paper are: supr-con
28
The categories of this paper are: alg-geom
16
The categories of this paper are: stat
11
The categories of this paper are: hep-lat
5
The categories of this paper are: gr-qc
3
The categories of this paper are: physics
24
The categories of this paper are: dg-ga
25
The categories of this paper are: patt-sol
21
The categories of this paper are: adap-org
15
The categories of this paper are: nucl-ex
26
The categories of this paper are: bayes-an
27
The categories of this paper are: comp-gas
0
The categories of this paper are: hep-ph
31
The categories of this paper are: ao-sci