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- Title
An atomic-level view of melting using femtosecond electron diffraction.
- Authors
Siwick, Bradley J; Dwyer, Jason R; Jordan, Robert E; Miller, R J Dwayne
- Abstract
We used 600-femtosecond electron pulses to study the structural evolution of aluminum as it underwent an ultrafast laser-induced solid-liquid phase transition. Real-time observations showed the loss of long-range order that was present in the crystalline phase and the emergence of the liquid structure where only short-range atomic correlations were present; this transition occurred in 3.5 picoseconds for thin-film aluminum with an excitation fluence of 70 millijoules per square centimeter. The sensitivity and time resolution were sufficient to capture the time-dependent pair correlation function as the system evolved from the solid to the liquid state. These observations provide an atomic-level description of the melting process, in which the dynamics are best understood as a thermal phase transition under strongly driven conditions.
- Publication
Science (New York, N.Y.), 2003, Vol 302, Issue 5649, p1382
- ISSN
1095-9203
- Publication type
Journal Article
- DOI
10.1126/science.1090052