Inverted nucleation for photoinduced nonequilibrium melting
SCIE
SCOPUS
- Title
- Inverted nucleation for photoinduced nonequilibrium melting
- Authors
- HWANG, JUNHA; IHM, YUNG OK; NAM, DAEWOONG; SHIN, JAEYOUNG; PARK, EUNYOUNG; LEE, SUNG YUN; LEE, HEEMIN; HEO, SEUNG-PHIL; KIM, SANGSOO; AHN, JE YOUNG; SHIM, JI HOON; KIM, MINSEOK; EOM, INTAE; NOH, DO YOUNG; SONG, CHANGYONG
- Date Issued
- 2024-05
- Publisher
- American Association for the Advancement of Science
- Abstract
- Ultrafast photoinduced melting provides an essential platform for studying nonequilibrium phase transitions by linking the kinetics of electron dynamics to ionic motions. Knowledge of dynamic balance in their energetics is essential to understanding how the ionic reaction is influenced by femtosecond photoexcited electrons with notable time lag depending on reaction mechanisms. Here, by directly imaging fluctuating density distributions and evaluating the ionic pressure and Gibbs free energy from two-temperature molecular dynamics that verified experimental results, we uncovered that transient ionic pressure, triggered by photoexcited electrons, controls the overall melting kinetics. In particular, ultrafast nonequilibrium melting can be described by the reverse nucleation process with voids as nucleation seeds. The strongly driven solid-to-liquid transition of metallic gold is successfully explained by void nucleation facilitated by photoexcited electron–initiated ionic pressure, establishing a solid knowledge base for understanding ultrafast nonequilibrium kinetics.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/123559
- DOI
- 10.1126/sciadv.adl6409
- ISSN
- 2375-2548
- Article Type
- Article
- Citation
- Science Advances, vol. 10, no. 18, 2024-05
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- There are no files associated with this item.
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