Персона: Ивлиев, Сергей Владимирович
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Обменные и корреляционные эффекты во взаимодействующем электронном газе простых металлов
Dependence of electron-lattice scattering cross sections on crystallographic orientations in Al2O3 and Mg2SiO4
© 2020 Elsevier B.V.We use the dynamical structure factor (DSF) based cross sections to study effects of crystal anisotropy on electron-lattice coupling. Being the Fourier transform of the lattice pair correlation function, the DSF considers manifestations of anisotropy in correlations between atomic positions as well as dynamics of atoms in a crystal. We demonstrate that even a weak anisotropy of α-Al2O3 and Mg2SiO4 crystals results in a difference between momenta transferred from an electron to the lattice along different crystallographic planes. This dependence can be important when describing relaxation of intense electronic excitation caused by impact of swift heavy ions or femtosecond laser pulses.
Pseudoatom Molecular Dynamics Method for Calculating the Coefficients of Viscosity and Ion Self-Diffusion in a Dense Plasma
© 2022, Pleiades Publishing, Inc.Abstract: A semiclassical version of the pseudoatom molecular dynamics method is used to calculate the coefficients of dynamic viscosity and ion self-diffusion of a warm and moderately heated dense plasma of a number of chemical elements, which are of interest for the high-energy-density physics, the solution of a number of applied geophysical and planetology problems, and a comparison with the calculated data of other authors. The effects caused by the Coulomb interaction in a medium and the quantum properties of the electronic subsystem of plasma are taken into account. Analytical approximations are proposed for the coefficients of viscosity and ion self-diffusion, and they can be used to simulate the dynamics of dense ionized matter for describing experiments in the high-energy-density physics.