Single two-zone elastic-plastic shock waves in solids

Zhakhovsky, V. V.; Budzevich, Mikalai M.; Inogamov, N. A.; White, C. T.; Oleynik, Ivan

doi:10.1063/1.3686502

Cited by 7 publications

(1 citation statement)

References 23 publications

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“…Material response to intense laser excitation is the subject of important research activities, and recent advances have revealed the determinant role of primary excitation events. Their accurate comprehension is necessary to correctly describe ultrafast structural dynamics [1,2], phase transitions [3,4], nanostruture formation [5], ablation dynamics [6,7], or strong shock propagation [8]. The interplay between ultrafast excitation and resulting excited material response still requires a comprehensive theoretical description for highly excited solid materials.…”

Section: Introductionmentioning

confidence: 99%

First-principles calculations of heat capacities of ultrafast laser-excited electrons in metals

Bévillon

Colombier

Recoules

et al. 2015

Applied Surface Science

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Ultrafast laser excitation can induce fast increases of the electronic subsystem temperature. The subsequent electronic evolutions in terms of band structure and energy distribution can determine the change of several thermodynamic properties, including one essential for energy deposition; the electronic heat capacity. Using density functional calculations performed at finite electronic temperatures, the electronic heat capacities dependent on electronic temperatures are obtained for a series of metals, including free electron like, transition and noble metals. The effect of exchange and correlation functionals and the presence of semicore electrons on electronic heat capacities are first evaluated and found to be negligible in most cases. Then, we tested the validity of the free electron approaches, varying the number of free electrons per atom. This shows that only simple metals can be correctly fitted with these approaches. For transition metals, the presence of localized d electrons produces a strong deviation toward high energies of the electronic heat capacities, implying that more energy is needed to thermally excite them, compared to free sp electrons. This is attributed to collective excitation effects strengthened by a change of the electronic screening at high temperature.

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