Physics – Condensed Matter – Statistical Mechanics
Scientific paper
2012-03-08
Physics
Condensed Matter
Statistical Mechanics
4 pages (letter), 2 figures
Scientific paper
When a liquid melt is cooled, a glass or phase transition can be obtained depending on the cooling rate. Yet, this behavior has not been clearly captured in energy landscape models. Here a model is provided in which two key ingredients are considered based in the landscape, metastable states and their multiplicity. Metastable states are considered as in two level system models. However, their multiplicity and topology allows a phase transition in the thermodynamic limit, while a transition to the glass is obtained for fast cooling. By solving the corresponding master equation, the minimal speed of cooling required to produce the glass is obtained as a function of the distribution of metastable and stable states. This allows to understand cooling trends due to rigidity considerations in chalcogenide glasses.
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J. Morris
This is the first solution to the problem of electrons in graphene under electromagnetic fields. It is a very complete article since its found the wave functions, spectrum and calculates conductivitity. Highly original the approach...
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