Nonthermal effects in solids after swift heavy ion impact

0584165 - ÚFP 2024 RIV NL eng J - Journal Article
Medvedev, Nikita - Voronkov, R. - Volkov, A.E.
Nonthermal effects in solids after swift heavy ion impact.
Nuclear Instruments & Methods in Physics Research Section B. Roč. 547, February (2024), č. článku 165218. ISSN 0168-583X. E-ISSN 1872-9584
R&D Projects: GA MŠMT(CZ) LM2023068; GA MŠMT EF16_013/0001552; GA MŠMT LTT17015
Institutional support: RVO:61389021
Keywords : Ab-initio modeling * Density functional theory * Electron-phonon coupling * Nonthermal heating * Nonthermal melting * Swift heavy ion * Tight binding method
OECD category: Fluids and plasma physics (including surface physics)
Impact factor: 1.3, year: 2022
Method of publishing: Limited access
https://www.sciencedirect.com/science/article/pii/S0168583X23004597?via%3Dihub

This contribution is a brief introduction to nonthermal effects related to modifications of the interatomic potential upon ultrafast excitation of the electronic system of solids, primarily focusing on the swift heavy ion track problem. We clarify the difference between the exchange of the kinetic energy of electrons (and holes) scattering on the lattice (electron–phonon coupling, “thermal effects”) and the relaxation of the nonequilibrium potential energy of a solid (“nonthermal effects”). We discuss that at different degrees of electronic excitation, the modification of the interatomic potential may result in various phase transitions without an increase of the atomic temperature, i.e., at room temperature (nonthermal melting, formation of the superionic state), or in atomic acceleration causing “nonthermal heating” of the target atoms. Examples of various theoretically predicted effects are given, supported by known experimental observations.
Permanent Link: https://hdl.handle.net/11104/0352151