Pressure-induced effects in the spectra of collective excitations in pure liquid metals - Université de Lorraine Access content directly
Journal Articles Journal of Physics: Condensed Matter Year : 2020

Pressure-induced effects in the spectra of collective excitations in pure liquid metals

Abstract

Collective dynamics of metallic melts at high pressures is one of the open issues of condensed matter physics. By means of ab initio molecular dynamics simulations, we examine features of dispersions of collective excitations through transverse current spectral functions, as a function of pressure. Typical metallic melts, such as Li and Na monovalent metals as well as Al, Pb and In polyvalent metals are considered. We firmly establish the emergence of a second branch of high-frequency transverse modes with pressure in these metals, that we associate with the pronounced high-frequency shoulder in the vibrational density of states. Similar correlation also exist with the low frequency modes. The origin of the pressure-induced evolution of transverse excitations in liquid metals is discussed.
No file

Dates and versions

hal-02480810 , version 1 (17-02-2020)

Identifiers

Cite

T. Bryk, Taras Demchuk, Jean-François Wax, Noël Jakse. Pressure-induced effects in the spectra of collective excitations in pure liquid metals. Journal of Physics: Condensed Matter, 2020, 32 (18), pp.184002. ⟨10.1088/1361-648X/ab6a31⟩. ⟨hal-02480810⟩
38 View
0 Download

Altmetric

Share

Gmail Facebook X LinkedIn More