Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Melting at dislocations and grain boundaries: A Phase Field Crystal
  study   Dislocation and grain boundary melting are studied in three dimensions using
the Phase Field Crystal method. Isolated dislocations are found to melt
radially outward from their core, as the localized excess elastic energy drives
a power law divergence in the melt radius. Dislocations within low-to-mid angle
grain boundaries melt similarly until an angle-dependent first order wetting
transition occurs when neighboring melted regions coalesce. High angle
boundaries are treated within a screening approximation, and issues related to
ensembles, metastability, and grain size are discussed.

11
The categories of this paper are: hep-lat
22
The categories of this paper are: chao-dyn
29
The categories of this paper are: funct-an
18
The categories of this paper are: econ
9
The categories of this paper are: nlin
8
The categories of this paper are: hep-ex
21
The categories of this paper are: adap-org
26
The categories of this paper are: bayes-an
35
The categories of this paper are: mtrl-th
14
The categories of this paper are: math-ph
37
The categories of this paper are: supr-con
36
The categories of this paper are: cmp-lg
19
The categories of this paper are: eess
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The categories of this paper are: nucl-th
20
The categories of this paper are: acc-phys
3
The categories of this paper are: physics