Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Novel Features in 2D and 3D Neutral, Cationic, and Anionic Gold Clusters
  Au_{5 \leq n \leq 8}^Z (Z = 0, \pm)   Low-energy structures are found on the potential energy surfaces of the
neutral, cationic, and anionic gold clusters Au_{5 \leq n \leq 8}^Z (Z = 0,
\pm) and on the neutral potential energy surface of Au_9. These structures
provide insights on the 2D - 3D transition in small neutral and charged gold
clusters. Two metastable long-lived dianions of gold clusters are reported as
well.

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The categories of this paper are: math
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The categories of this paper are: chem-ph
31
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: math-ph
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The categories of this paper are: gr-qc
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The categories of this paper are: stat
15
The categories of this paper are: nucl-ex
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The categories of this paper are: bayes-an
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The categories of this paper are: astro-ph
37
The categories of this paper are: supr-con
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The categories of this paper are: cs
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The categories of this paper are: funct-an
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The categories of this paper are: quant-ph
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The categories of this paper are: alg-geom
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The categories of this paper are: hep-lat