Physics – Condensed Matter – Materials Science
Scientific paper
2009-11-27
J. Chem. Phys. 131, 124510, (2009)
Physics
Condensed Matter
Materials Science
Scientific paper
10.1063/1.3238548
We combine density functional theory (DFT) with molecular dynamics simulations based on an accurate atomistic force field to calculate the pressure derivative of the melting temperature of magnesium oxide at ambient pressure - a quantity for which a serious disagreement between theory and experiment has existed for almost 15 years. We find reasonable agreement with previous DFT results and with a very recent experimental determination of the slope. We pay particular attention to areas of possible weakness in theoretical calculations and conclude that the long-standing discrepancy with experiment could only be explained by a dramatic failure of existing density functionals or by flaws in the original experiment.
Scandolo Sandro
Tangney Paul
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