Herzog, Marc and von Reppert, Alexander and Pudell, Jan-Etienne and Henkel, Carsten and Kronseder, Matthias and Back, Christian H. and Maznev, Alexei A. and Bargheer, Matias (2022) Phonon-Dominated Energy Transport in Purely Metallic Heterostructures. ADVANCED FUNCTIONAL MATERIALS, 32 (41): 2206179. ISSN 1616-301X, 1616-3028
Full text not available from this repository. (Request a copy)Abstract
Ultrafast X-ray diffraction is used to quantify the transport of energy in laser-excited nanoscale gold-nickel (Au-Ni) bilayers. Electron transport and efficient electron-phonon coupling in Ni convert the laser-deposited energy in the conduction electrons within a few picoseconds into a strong non-equilibrium between hot Ni and cold Au phonons at the bilayer interface. Modeling of the subsequent equilibration dynamics within various two-temperature models confirms that for ultrathin Au films, the thermal transport is dominated by phonons instead of conduction electrons because of the weak electron-phonon coupling in Au.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | LATTICE-DYNAMICS; ELECTRON; SOLIDS; heterostructures; nanoscale energy transports; non-equilibrium; thermal transports; ultrafast phenomena |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Experimental and Applied Physics |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 02 Feb 2024 07:05 |
| Last Modified: | 02 Feb 2024 07:05 |
| URI: | https://pred.uni-regensburg.de/id/eprint/58272 |
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