Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Observation of Phasons in Magnetic Shape Memory Alloy Ni2MnGa   An inelastic neutron scattering study of the lattice dynamics of the
martensite phase of the ferromagnetic shape memory alloy, Ni2MnGa, reveals the
presence of well-defined phasons associated with the charge density wave (CDW)
resulting from Fermi surface (FS) nesting. The velocity and the temperature
dependence of the phason are measured as well as the anomalous [110]-TA2
phonon.

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The categories of this paper are: quant-ph
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The categories of this paper are: chem-ph
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The categories of this paper are: eess
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The categories of this paper are: hep-ex
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The categories of this paper are: comp-gas
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The categories of this paper are: q-alg
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The categories of this paper are: nucl-th
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The categories of this paper are: cs
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The categories of this paper are: ao-sci
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The categories of this paper are: solv-int
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The categories of this paper are: bayes-an
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The categories of this paper are: alg-geom
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The categories of this paper are: atom-ph
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The categories of this paper are: mtrl-th
20
The categories of this paper are: acc-phys
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The categories of this paper are: supr-con