Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: New strategy for black phosphorus crystal growth through ternary
  clathrate   We are reporting a new synthetic strategy to grow large size black phosphorus
(Black-P) crystals through a ternary clathrate Sn$_{24}$P$_{22-x}$I$_8$, under
lower synthetic temperature and pressure. The Black-P crystals are found grown
in situ at the site where the solid clathrate originally resides, which
suggests chemical vapor mineralizer does not play a critical role for the
Black-P formation. More detailed systematical studies has indicated the P
vacancies in the framework of ternary clathrate Sn$_{24}$P$_{22-x}$I$_8$ is
important for the subsequent Black-P from phosphorus vapors, and a likely
Vapor-Solid-Solid (VSS) model is responsible for the Black-P crystal growth.
The obtained room temperature mobility {\mu} is ~ 350 $cm^2/Vs$ from Hall
measurements at mechanically-cleaved flake, where noticeable micro-cracks are
visible. The obtained high mobility value further suggest the high quality of
the Black-P crystals synthesized through this route.

28
The categories of this paper are: alg-geom
2
The categories of this paper are: math
30
The categories of this paper are: q-alg
24
The categories of this paper are: dg-ga
25
The categories of this paper are: patt-sol
36
The categories of this paper are: cmp-lg
11
The categories of this paper are: hep-lat
5
The categories of this paper are: gr-qc
14
The categories of this paper are: math-ph
10
The categories of this paper are: q-bio
33
The categories of this paper are: plasm-ph
26
The categories of this paper are: bayes-an
18
The categories of this paper are: econ
32
The categories of this paper are: atom-ph
13
The categories of this paper are: quant-ph
1
The categories of this paper are: cs