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Phase-space modeling of solid-state plasmas

A journey from classical to quantum

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Abstract

Conduction electrons in metallic nano-objects (\(1\,\mathrm{nm} = 10^{-9}\, \mathrm{m}\)) behave as mobile negative charges confined by a fixed positively charged background, the atomic ions. In many respects, this electron gas displays typical plasma properties such as screening and Langmuir waves, with more or less pronounced quantum features depending on the size of the object. To study these dynamical effects, the mathematical artillery of condensed matter theorists mainly relies on wave function \(\psi (\varvec{r},t)\)-based methods, such as the celebrated Hartree–Fock equations. The theoretical plasma physicist, in contrast, lives and breaths in the six-dimensional phase space, where the electron gas is fully described by a probability distribution function \(f(\varvec{r},\varvec{p},t)\) that evolves according to an appropriate kinetic equation. Here, we illustrate the power and flexibility of the phase-space approach to describe the electron dynamics in small nano-objects. Starting from classical and semiclassical scenarios, we progressively add further features that are relevant to solid-state plasmas: quantum, spin, and relativistic effects, as well as collisions and dissipation. As examples of applications, we study the spin-induced modifications to the linear response of a homogeneous electron gas and the nonlinear dynamics of the electrons confined in a thin metal films of nanometric dimensions.

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From Cobley et al. (2009)

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From Bigot et al. (2009)

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From Sun et al. (2016)

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From Manfredi et al. (2010)

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From Manfredi et al. (2010)

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From Manfredi et al. (2010)

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Correspondence to Giovanni Manfredi.

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Manfredi, G., Hervieux, PA. & Hurst, J. Phase-space modeling of solid-state plasmas. Rev. Mod. Plasma Phys. 3, 13 (2019). https://doi.org/10.1007/s41614-019-0034-0

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  • DOI: https://doi.org/10.1007/s41614-019-0034-0

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