TY  - JOUR
A1  - Mattern, Maximilian
A1  - von Reppert, Alexander
A1  - Zeuschner, Steffen Peer
A1  - Pudell, Jan-Etienne
A1  - Kühne, F.
A1  - Diesing, Detlef
A1  - Herzog, Marc
A1  - Bargheer, Matias
T1  - Electronic energy transport in nanoscale Au/Fe hetero-structures in the perspective of ultrafast lattice dynamics
T2  - Applied physics letters
N2  - We study the ultrafast electronic transport of energy in a photoexcited nanoscale Au/Fe hetero-structure by modeling the spatiotemporal profile of energy densities that drives transient strain, which we quantify by femtosecond x-ray diffraction. This flow of energy is relevant for intrinsic demagnetization and ultrafast spin transport. We measured lattice strain for different Fe layer thicknesses ranging from few atomic layers to several nanometers and modeled the spatiotemporal flow of energy densities. The combination of a high electron-phonon coupling coefficient and a large Sommerfeld constant in Fe is found to yield electronic transfer of nearly all energy from Au to Fe within the first hundreds of femtoseconds.
Y1  - 2022
UR  - https://publishup.uni-potsdam.de/frontdoor/index/index/docId/62454
SN  - 0003-6951
SN  - 1077-3118
VL  - 120
IS  - 9
PB  - AIP Publishing
CY  - Melville
ER  -