Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Tuneable local order in thermoelectric crystals   Although crystalline solids are characterized by their periodic structures,
some are only periodic on average and deviate on a local scale. Distinct local
orderings can exist with identical periodic structures making their differences
hidden to normal diffraction methods. Using x-ray scattering we investigate the
thermoelectric half-Heusler, Nb1-xCoSb, with high vacancy concentrations, where
signs of local order have been attributed to differences in stoichiometry. We
show that the composition is actually always very close to x = 1/6 irrespective
of nominal sample composition, and that the synthesis method controls the local
order. The vacancy distribution is shown to follow a vacancy repulsion model,
and local structural relaxations around the vacancies are characterized.
Control over the local structure provides a new frontier for tuning material
properties.

8
The categories of this paper are: hep-ex
3
The categories of this paper are: physics
37
The categories of this paper are: supr-con
25
The categories of this paper are: patt-sol
13
The categories of this paper are: quant-ph
20
The categories of this paper are: acc-phys
32
The categories of this paper are: atom-ph
35
The categories of this paper are: mtrl-th
36
The categories of this paper are: cmp-lg
15
The categories of this paper are: nucl-ex
0
The categories of this paper are: hep-ph
27
The categories of this paper are: comp-gas
6
The categories of this paper are: astro-ph
14
The categories of this paper are: math-ph
19
The categories of this paper are: eess
2
The categories of this paper are: math