Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: An Investigation into the Kinetics and Mechanism of Phase Transitions in
  Optical Phase Change Ternary Alloy $Ge_2Sb_2Te_5$   Ternary alloys of \textit{Ge-Sb-Te (GST)} have been extensively studied due
to their unique ability display a reversible change in their phase upon
stimulation by optical pulses i.e amorphous \textit{(a-GST)} to crystalline
\textit{(c-GST)} and vice-versa. The two phases exhibit remarkably different
electrical and optical properties like conductivity, reflectivity, refractive
index and optical loss, this coupled with their high phase switching speeds,
low power phase switching, large switching cycles, large measurable optical and
electrical contrast, and phase stability makes GST alloys stand out from other
phase change materials \textit{(PCM)}. GST alloys have already found extensive
use in optical disks and electronic memories due to their non-volatility and
zero static power consumption, but the precise mechanism of the phase change is
not clearly understood. The phase change mechanism has usually been attributed
to the optical pulse, usually a high power short pulse laser, heating up the
\textit{c-GST} alloy to above its melting temperature (\textit{$T_m$}) after
which, if it is cooled rapidly enough to below the glass transition temperature
(\textit{$T_g$}), the atoms are fixed in place due to the drastic reduction in
their mobility, resulting in a phase which exhibits structure similar to a
frozen liquid and lacks long range order i.e amorphous. If alternatively the
\textit{a-GST} is heated above \textit{$T_g$} with a intermediate power laser
pulse for a significant amount of time to induce nucleation, then this favours
the shift back to the energetically favourable crystalline phase. With the
growing interest in next generation data storage technology for photonic and
neuromorphic computing, the research into understanding and improving the
properties of GST alloys has also been rekindled. In this term paper we hope to
investigate and gain a deeper understanding and app

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The categories of this paper are: hep-ex
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The categories of this paper are: econ
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The categories of this paper are: adap-org
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The categories of this paper are: stat
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The categories of this paper are: cmp-lg
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The categories of this paper are: math-ph
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The categories of this paper are: astro-ph
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The categories of this paper are: funct-an
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The categories of this paper are: solv-int
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The categories of this paper are: physics
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The categories of this paper are: plasm-ph
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The categories of this paper are: hep-th
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The categories of this paper are: cs
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The categories of this paper are: alg-geom
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The categories of this paper are: comp-gas
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The categories of this paper are: atom-ph