Nonthermal effects in solids after swift heavy ion impact

0585130 - FZÚ 2025 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, Feb (2024), č. článku 165218. ISSN 0168-583X. E-ISSN 1872-9584
R&D Projects: GA MŠMT LTT17015; GA MŠMT(CZ) LM2023068; GA MŠMT(CZ) EF18_053/0016627
Grant - others:OP VVV - Mobility FZU 2(XE) CZ.02.2.69/0.0/0.0/18_053/0016627
Research Infrastructure: e-INFRA CZ - 90140
Institutional support: RVO:68378271
Keywords : Swift heavy ion * nonthermal melting * nonthermal heating * Ab-initio modeling * density functional theory * tight binding method * electron-phonon coupling
OECD category: Fluids and plasma physics (including surface physics)
Impact factor: 1.3, year: 2022

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/11104/0352863