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- W2763651680 abstract "Hot-electron dynamics at metal surfaces are crucial for charge transport properties and chemical reactions at metal/organic interfaces. In order to study the influence of electron-donating adsorbates on hot-electron lifetimes we performed femtosecond time-resolved two-photon photoemission measurements of tetrathiafulvalene (TTF)-covered Au(111) surfaces. The electron-donating nature of TTF provides density of states near the Fermi energy (${E}_{F}$) increasing the possibility for electron-electron scattering events. This leads to an additional fast electron-electron scattering assisted hot-electron relaxation channel for low intermediate state energies (${E}_{i}ensuremath{-}{E}_{F}$) at the TTF/Au(111) interface with hot-electron lifetimes up to $340phantom{rule{0.28em}{0ex}}mathrm{fs}$. However, suppressing the electron donation via intercalation of electron-accepting tetracyanoquinodimethane molecules causes quenching of this fast electron relaxation channel. This results in an asymptotic increase of the hot-electron lifetimes for infinitesimal small intermediate state energies up to about $1000phantom{rule{0.28em}{0ex}}mathrm{fs}$ as predicted by the pure Landau theory of Fermi liquids." @default.
- W2763651680 created "2017-10-20" @default.
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- W2763651680 date "2017-10-11" @default.
- W2763651680 modified "2023-09-24" @default.
- W2763651680 title "Adsorbate-mediated relaxation dynamics of hot electrons at metal/organic interfaces" @default.
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- W2763651680 doi "https://doi.org/10.1103/physrevb.96.144304" @default.
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