Concept of a single temperature for highly nonequilibrium laser-induced hydrogen desorption from a ruthenium surface
- Laser-induced condensed phase reactions are often interpreted as nonequilibrium phenomena that go beyond conventional thermodynamics. Here, we show by Langevin dynamics and for the example of femtosecond-laser desorption of hydrogen from a ruthenium surface that light adsorbates thermalize rapidly due to ultrafast energy redistribution after laser excitation. Despite the complex reaction mechanism involving hot electrons in the surface region, all desorption product properties are characterized by equilibrium distributions associated with a single, unique temperature. This represents an example of ultrahot chemistry on the subpicosecond time scale.
| Author details: | Gernot FüchselORCiD, Jean Christophe TremblayORCiDGND, Tillmann KlamrothORCiDGND, Peter SaalfrankORCiDGND, C. Frischkorn |
|---|---|
| DOI: | https://doi.org/10.1103/PhysRevLett.109.098303 |
| ISSN: | 0031-9007 |
| Title of parent work (English): | Physical review letters |
| Publisher: | American Physical Society |
| Place of publishing: | College Park |
| Publication type: | Article |
| Language: | English |
| Year of first publication: | 2012 |
| Publication year: | 2012 |
| Release date: | 2017/03/26 |
| Volume: | 109 |
| Issue: | 9 |
| Number of pages: | 5 |
| Funding institution: | Deutsche Forschungsgemeinschaft [Sonderforschungsbereich 450, Sa 547/8-1] |
| Organizational units: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Physik und Astronomie |
| Peer review: | Referiert |
