Phonon‐Dominated Energy Transport in Purely Metallic Heterostructures

URN to cite this document:: urn:nbn:de:bvb:355-epub-536875
DOI to cite this document:: 10.5283/epub.53687

Herzog, Marc ; von Reppert, Alexander ; Pudell, Jan‐Etienne ; Henkel, Carsten ; Kronseder, Matthias

; Back, Christian H.

; Maznev, Alexei A. ; Bargheer, Matias

License: Creative Commons Attribution 4.0
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Date of publication of this fulltext: 07 Feb 2023 05:39

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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 ...