Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The multiple symmetry sustaining phase transitions of spin ice   We present the full phase diagram of the dumbbell model of spin ice as a
function of temperature, chemical potential and staggered chemical potential
which breaks the translational lattice symmetry in favour of charge crystal
ordering. We observe a double winged structure with five possible phases,
monopole fluid (spin ice), fragmented single monopole crystal phases and double
monopole crystal, the zinc blend structure. Our model provides a skeleton for
liquid-liquid phase transitions and for the winged structures observed for
itinerant magnets under pressure and external field. We relate our results to
recent experiments on Ho$_2$Ir$_2$O$_7$ and propose a wide ranging set of new
experiments that exploit the phase diagram, including high pressure protocols,
dynamical scaling of Kibble-Zurek form and universal violations of the
fluctuation-dissipation theorem.

18
The categories of this paper are: econ
28
The categories of this paper are: alg-geom
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The categories of this paper are: eess
20
The categories of this paper are: acc-phys
34
The categories of this paper are: chem-ph
0
The categories of this paper are: hep-ph
5
The categories of this paper are: gr-qc
35
The categories of this paper are: mtrl-th
10
The categories of this paper are: q-bio
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The categories of this paper are: math-ph
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The categories of this paper are: quant-ph
37
The categories of this paper are: supr-con
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The categories of this paper are: patt-sol
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The categories of this paper are: hep-lat
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The categories of this paper are: comp-gas
33
The categories of this paper are: plasm-ph