Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Lattice dynamics in the spin-1/2 frustrated kagome compound
  herbertsmithite   We investigate the lattice dynamics in the spin-1/2 frustrated kagome
compound herbertsmithite ZnCu$_3$(OH)$_6$Cl$_2$ by a combination of infrared
spectroscopy measurements and ab initio density functional theory calculations,
and provide an unambiguous assignment of infrared-active lattice vibrations
involving in-plane and out-of-plane atom displacements in the kagome layers.
Upon cooling, non-thermal red-shifts and broadening appear specifically for
modes that deform the kagome layer or affect the Cu-O-Cu bond angles, thus
creating pronounced modifications of the antiferromagnetic exchange coupling.
Our results indicate the presence of a strong magnetoelastic coupling to the
spin system. We discuss the effects of this coupling and its relation to recent
experiments reporting a global symmetry reduction of the kagome lattice
symmetry.

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The categories of this paper are: plasm-ph
28
The categories of this paper are: alg-geom
22
The categories of this paper are: chao-dyn
2
The categories of this paper are: math
25
The categories of this paper are: patt-sol
29
The categories of this paper are: funct-an
26
The categories of this paper are: bayes-an
27
The categories of this paper are: comp-gas
15
The categories of this paper are: nucl-ex
34
The categories of this paper are: chem-ph
18
The categories of this paper are: econ
13
The categories of this paper are: quant-ph
8
The categories of this paper are: hep-ex
36
The categories of this paper are: cmp-lg
1
The categories of this paper are: cs
30
The categories of this paper are: q-alg