Semiclassical Vlasov and fluid models for an electron gas with spin effects
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In this paper, a four-component Vlasov equation for a system composed of spin-1/2 fermions (typically electrons) is derived, where the orbital part of the motion is classical, whereas the spin degrees of freedom are treated in a completely quantum-mechanical way.Abstract:
We derive a four-component Vlasov equation for a system composed of spin-1/2 fermions (typically electrons). The orbital part of the motion is classical, whereas the spin degrees of freedom are treated in a completely quantum-mechanical way. The corresponding hydrodynamic equations are derived by taking velocity moments of the phase-space distribution function. This hydrodynamic model is closed using a maximum entropy principle in the case of three or four constraints on the fluid moments, both for Maxwell-Boltzmann and Fermi-Dirac statistics.read more
Citations
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Journal ArticleDOI
Quantum kinetics of spinning neutral particles: General theory and Spin wave dispersion
TL;DR: In this article, a generalization of the many-particle quantum hydrodynamics was proposed to derive the kinetic and hydrodynamic equations for both the three-dimensional and two-dimensional systems of neutral spinning particles.
Journal ArticleDOI
Spin current generation by ultrafast laser pulses in ferromagnetic nickel films
TL;DR: In this article, a semiclassical phase-space model is used to study the ultrafast charge and spin dynamics in thin ferromagnetic films and it is shown that an oscillating spin current can be generated in the film via the application of a femtosecond laser pulse in the visible range.
Journal ArticleDOI
Kinetic analysis of spin current contribution to spectrum of electromagnetic waves in spin-1/2 plasma. I. Dielectric permeability tensor for magnetized plasmas
TL;DR: In this article, the dielectric permeability tensor for spin polarized plasmas is derived in terms of the spin-1/2 quantum kinetic model in six-dimensional phase space.
Journal ArticleDOI
Phase-space methods for the spin dynamics in condensed matter systems.
TL;DR: Using the phase-space formulation of quantum mechanics, a four-component Wigner equation is derived for a system composed of spin- fermions including the Zeeman effect and the spin–orbit coupling to form a self-consistent mean-field model.
Journal ArticleDOI
Kinetic analysis of spin current contribution to spectrum of electromagnetic waves in spin-1/2 plasma, Part I: Dielectric permeability tensor for magnetized plasmas
TL;DR: In this paper, the dielectric permeability tensor for spin polarized plasmas is derived in terms of the spin-1/2 quantum kinetic model in six-dimensional phase space.
References
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TL;DR: The relaxation processes of electrons and spins systems following the absorption of femtosecondoptical pulses in ferromagnetic nickel have been studied using optical and magneto-optical pump-probetechniques and the experimental results are adequately described by a model including three interacting reservoirs.
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