Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Lattice dynamical origin of peak thermoelectric performance in
  AgPbmSbTe2+m observed by inelastic neutron scattering   Phonon densities of states (DOS) for the high performing thermoelectric
material, AgPbmSbTe2+m (LAST-m, m = 16, 18, and 20), were extracted from
time-of-flight inelastic neutron scattering measurements. The phonon DOS of
LAST-18 differs remarkably from LAST-16 and LAST-20 by exhibiting a dramatic
broadening of its acoustic modes that increases on heating. This broadening
coincides with a minimum in the thermal conductivity, a maximum in the
electrical conductivity and Seebeck coefficient, and a related peak in
thermoelectric performance. We argue that the anomalous broadening originates
with scattering enhanced by modifications to Te-Ag(Sb) bonds caused by their
resonant electronic states falling near the Fermi energy for m = 18.

18
The categories of this paper are: econ
23
The categories of this paper are: solv-int
31
The categories of this paper are: ao-sci
37
The categories of this paper are: supr-con
20
The categories of this paper are: acc-phys
33
The categories of this paper are: plasm-ph
12
The categories of this paper are: nucl-th
1
The categories of this paper are: cs
7
The categories of this paper are: hep-th
30
The categories of this paper are: q-alg
9
The categories of this paper are: nlin
32
The categories of this paper are: atom-ph
0
The categories of this paper are: hep-ph
17
The categories of this paper are: q-fin
22
The categories of this paper are: chao-dyn
8
The categories of this paper are: hep-ex