Kiel 2011 – scientific programme
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P: Fachverband Plasmaphysik
P 18: Poster: Theorie/Simulation dichter und stark gekoppelter Plasmen
P 18.8: Poster
Wednesday, March 30, 2011, 16:30–18:30, Foyer
Proton crystallization in a dense hydrogen plasma — •Michael Bonitz1, Vladimir Filinov2, Vladimir Fortov2, Pavel Levashov2, and Holger Fehske3 — 1Institut für Theoretische Physik und Astrophysik, CAU Kiel — 2Institute for High Energy Density, Russian Academy of Sciences — 3Institut für Physik, EMAU Greifswald
In a recent letter we have predicted that in a dense hydrogen plasma at sufficiently low temperatures protons would spontaneously order into a lattice which is embedded into an electron gas. The conditions for the stability of such an ion crystal in a neutral two-component plasma were derived in Ref. 1, in particular, we found that that a necessary condition for crystallization is that the mass of the heavy compononent exceeds the electron mass by a factor of about 80, so that effect should also be observable in various semiconductor materials [2].
Here we concentrate on the phase diagram of the proton crystal for which only a rough estimate is known. We present extensive first principle path integral Monte Carlo simulations which allow to predict the temperature and density range for proton crystallization in dense laboratory experiments.
[1] M. Bonitz, V.S. Filinov, V.E. Fortov, P.R. Levashov, and H. Fehske, Phys. Rev. Lett. 95, 235006 (2005)
[2] M. Bonitz, V.S. Filinov, V.E. Fortov. P.R. Levashov, and H. Fehske, J. Phys. A: Math. Gen. 39, 4717 (2006)