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Electron-phonon coupling and nonthermal effects in gold nano-objects at high electronic temperatures
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SYSNO ASEP 0566967 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Electron-phonon coupling and nonthermal effects in gold nano-objects at high electronic temperatures Author(s) Medvedev, Nikita (FZU-D) ORCID, RID
Milov, I. (NL)Number of authors 2 Article number 4883 Source Title Materials. - : MDPI
Roč. 15, č. 14 (2022)Number of pages 11 s. Language eng - English Country CH - Switzerland Keywords electron-phonon coupling ; nanoparticle ; ultrathin layer ; nonthermal melting ; tight-binding molecular dynamics ; Boltzmann collision integrals ; XTANT Subject RIV BH - Optics, Masers, Lasers OECD category Optics (including laser optics and quantum optics) R&D Projects LM2018114 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) LTT17015 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Research Infrastructure e-INFRA CZ - 90140 - CESNET, zájmové sdružení právnických osob Method of publishing Open access Institutional support FZU-D - RVO:68378271 UT WOS 000831367000001 EID SCOPUS 85137261237 DOI 10.3390/ma15144883 Annotation Laser irradiation of metals is widely used in research and applications. In this work, we study how the material geometry affects electron–phonon coupling in nano-sized gold samples: an ultrathin layer, nano-rod, and two types of gold nanoparticles (cubic and octahedral). We use the combined tight-binding molecular dynamics Boltzmann collision integral method implemented within XTANT-3 code to evaluate the coupling parameter in irradiation targets at high electronic temperatures (up to Te~20,000 K). Our results show that the electron–phonon coupling in all objects with the same fcc atomic structure (bulk, layer, rod, cubic and octahedral nanoparticles) is nearly identical at electronic temperatures above Te~7000 K, independently of geometry and dimensionality. At low electronic temperatures, reducing dimensionality reduces the coupling parameter. Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2023 Electronic address https://hdl.handle.net/11104/0338235
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