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Kinetics of laser-induced melting of thin gold film: How slow can it get?

Melting is a common and well-studied phenomenon that still reveals new facets when triggered by laser excitation and probed with ultrafast electron diffraction. Recent experimental evidence of anomalously slow nanosecond-scale melting of thin gold films irradiated by femtosecond laser pulses motivat...

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Autores principales: Arefev, Mikhail I., Shugaev, Maxim V., Zhigilei, Leonid V.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Association for the Advancement of Science 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9491712/
https://www.ncbi.nlm.nih.gov/pubmed/36129986
http://dx.doi.org/10.1126/sciadv.abo2621
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author Arefev, Mikhail I.
Shugaev, Maxim V.
Zhigilei, Leonid V.
author_facet Arefev, Mikhail I.
Shugaev, Maxim V.
Zhigilei, Leonid V.
author_sort Arefev, Mikhail I.
collection PubMed
description Melting is a common and well-studied phenomenon that still reveals new facets when triggered by laser excitation and probed with ultrafast electron diffraction. Recent experimental evidence of anomalously slow nanosecond-scale melting of thin gold films irradiated by femtosecond laser pulses motivates computational efforts aimed at revealing the underlying mechanisms of melting. Atomistic simulations reveal that a combined effect of lattice superheating and relaxation of laser-induced stresses ensures the dominance of the homogeneous melting mechanism at all energies down to the melting threshold and keeps the time scale of melting within ~100 picoseconds. The much longer melting times and the prominent contribution of heterogeneous melting inferred from the experiments cannot be reconciled with the atomistic simulations by any reasonable variation of the electron-phonon coupling strength, thus suggesting the need for further coordinated experimental and theoretical efforts aimed at addressing the mechanisms and kinetics of laser-induced melting in the vicinity of melting threshold.
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spelling pubmed-94917122022-10-03 Kinetics of laser-induced melting of thin gold film: How slow can it get? Arefev, Mikhail I. Shugaev, Maxim V. Zhigilei, Leonid V. Sci Adv Physical and Materials Sciences Melting is a common and well-studied phenomenon that still reveals new facets when triggered by laser excitation and probed with ultrafast electron diffraction. Recent experimental evidence of anomalously slow nanosecond-scale melting of thin gold films irradiated by femtosecond laser pulses motivates computational efforts aimed at revealing the underlying mechanisms of melting. Atomistic simulations reveal that a combined effect of lattice superheating and relaxation of laser-induced stresses ensures the dominance of the homogeneous melting mechanism at all energies down to the melting threshold and keeps the time scale of melting within ~100 picoseconds. The much longer melting times and the prominent contribution of heterogeneous melting inferred from the experiments cannot be reconciled with the atomistic simulations by any reasonable variation of the electron-phonon coupling strength, thus suggesting the need for further coordinated experimental and theoretical efforts aimed at addressing the mechanisms and kinetics of laser-induced melting in the vicinity of melting threshold. American Association for the Advancement of Science 2022-09-21 /pmc/articles/PMC9491712/ /pubmed/36129986 http://dx.doi.org/10.1126/sciadv.abo2621 Text en Copyright © 2022 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution License 4.0 (CC BY). https://creativecommons.org/licenses/by/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution license (https://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Physical and Materials Sciences
Arefev, Mikhail I.
Shugaev, Maxim V.
Zhigilei, Leonid V.
Kinetics of laser-induced melting of thin gold film: How slow can it get?
title Kinetics of laser-induced melting of thin gold film: How slow can it get?
title_full Kinetics of laser-induced melting of thin gold film: How slow can it get?
title_fullStr Kinetics of laser-induced melting of thin gold film: How slow can it get?
title_full_unstemmed Kinetics of laser-induced melting of thin gold film: How slow can it get?
title_short Kinetics of laser-induced melting of thin gold film: How slow can it get?
title_sort kinetics of laser-induced melting of thin gold film: how slow can it get?
topic Physical and Materials Sciences
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9491712/
https://www.ncbi.nlm.nih.gov/pubmed/36129986
http://dx.doi.org/10.1126/sciadv.abo2621
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