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Jérôme Daligault

Publications and source records attributed to Jérôme Daligault.

4 recordsLinked to original sources
PubMed2006

Crystal nucleation in the one-component plasma.

We have performed molecular dynamics simulations to study the kinetics of crystal nucleation in the one-component plasma. We have monitored nucleation in the supercooled liquid phase by following the time evolution of the size distribution of crystal nuclei formed during the phase transition. Although several observations are consistent with classical nucleation theory such as transient effects and the existence of a free-energy barrier to crystallization, we could not unambiguously identify a critical size for the crystal nuclei formed within the metastable phase.

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PubMed2006

Liquid-state properties of a one-component plasma.

As a consequence of strong collective behavior, the microscopic dynamics of the one-component plasma (OCP) differs significantly from that of ordinary liquids. We show that, when particle caging dominates, the OCP transport coefficients nevertheless satisfy universal laws satisfied by dense ordinary fluids: the Stokes-Einstein relation, the Arrhenius law of viscosity, and several excess-entropy scaling relations. These results extend to long-range interaction potentials, the unifying description of atomic transport in condensed matter.

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PubMed2005

Semiclassical model for the ionic self-diffusion coefficient in white dwarfs.

Under the extreme conditions of massive white dwarfs, which have ionic densities that exceed 10(29) cm(-3) , the ions can be both very strongly coupled and partially degenerate. We present a simple model for self-diffusion in such white dwarfs that utilizes the known one-component plasma diffusion coefficient and scalings derived from the short-time expansions of the velocity autocorrelation function and the memory function. Since the ions are weakly degenerate, we utilize a simple semiclassical correction to the classical dynamics. We find enhanced diffusion, relative to the purely classical calculation, which is more significant at smaller values of the Coulomb coupling parameter.

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