Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Piezoelectric scattering of optical polaron in halide perovskites   For the intrinsic carriers of MAPbBr$_{3}$, the temperature $T$ dependent
mobility $\mu(T)$ of behaves like $\mu\propto T^{-1/2}$ in piezoelectric
tetragonal phase, $\mu\propto T^{-1.4}$ in non-piezoelectric cubic phase. But
for the photo-generated carriers in other halide perovskites ABX$_{3}$,
$\mu\propto T^{-3/2}$ behavior is typical. Due to the strong interaction of
carrier with longitudinal optical phonon, in ABX$_{3}$ the carriers mainly
exist as optical polarons. The softness of ABX$_{3}$ renders it without
inversion center in tetragonal phase, which allows piezoelectric effect at low
carrier concentration. The variations of $\mu(T)$ behavior results from (1) the
wave vector dependence of the piezoelectric interaction of polarons with
acoustic phonons is different from that of ordinary polaron-acoustic phonon
interaction; (2) the residual interaction of polaron with 2 longitudinal
optical phonons can be ignored at low temperature, but is important at higher
temperature; and (3) the concentration of intrinsic carriers is determined by
temperature, while the concentration of photo-generated carriers is determined
by the incident flux of photons.

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The categories of this paper are: q-bio
11
The categories of this paper are: hep-lat
31
The categories of this paper are: ao-sci
33
The categories of this paper are: plasm-ph
19
The categories of this paper are: eess
28
The categories of this paper are: alg-geom
12
The categories of this paper are: nucl-th
32
The categories of this paper are: atom-ph
25
The categories of this paper are: patt-sol
36
The categories of this paper are: cmp-lg
27
The categories of this paper are: comp-gas
30
The categories of this paper are: q-alg
0
The categories of this paper are: hep-ph
1
The categories of this paper are: cs
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The categories of this paper are: hep-th
2
The categories of this paper are: math