Nonequilibrium electron dynamics in noble metals

N. Del Fatti, C. Voisin, M. Achenmann, Stylianos Tzortzakis, D. Christofilos, F. Vallée

Research output: Contribution to journalArticle

302 Citations (Scopus)

Abstract

Electron-electron and electron-lattice interactions in noble metals are discussed in the light of two-color femtosecond pump-probe measurements in silver films. The internal thermalization of a nonequilibrium electron distribution created by intraband absorption of a pump pulse is followed by probing the induced optical property changes in the vicinity of the frequency threshold for the d band to Fermi surface transitions. This is shown to take place with a characteristic time constant of 350 fs, significantly shorter than previously reported in gold. This difference is ascribed to a weaker screening of the electron-electron interaction by the d-band electrons in silver than in gold. These results are in quantitative agreement with numerical simulations of the electron relaxation dynamics using a reduced static screening of the electron-electron Coulomb interaction, and including bound electron screening. Electron-lattice thermalization has been studied using a probe frequency out of resonance with the interband transitions. In both materials, the transient nonthermal nature of the electron distribution leads to the observation of a short-time delay reduction of the energy-loss rate of the electron gas to the lattice, in very good agreement with our theoretical model.

Original languageEnglish
Pages (from-to)16956-16966
Number of pages11
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume61
Issue number24
Publication statusPublished - 2000
Externally publishedYes

Fingerprint

Precious metals
noble metals
Electrons
electrons
screening
Screening
electron distribution
Silver
Gold
silver
pumps
gold
Pumps
Electron-electron interactions
probes
Electron gas
Fermi surface
Electron transitions
Coulomb interactions
time constant

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Del Fatti, N., Voisin, C., Achenmann, M., Tzortzakis, S., Christofilos, D., & Vallée, F. (2000). Nonequilibrium electron dynamics in noble metals. Physical Review B - Condensed Matter and Materials Physics, 61(24), 16956-16966.

Nonequilibrium electron dynamics in noble metals. / Del Fatti, N.; Voisin, C.; Achenmann, M.; Tzortzakis, Stylianos; Christofilos, D.; Vallée, F.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 61, No. 24, 2000, p. 16956-16966.

Research output: Contribution to journalArticle

Del Fatti, N, Voisin, C, Achenmann, M, Tzortzakis, S, Christofilos, D & Vallée, F 2000, 'Nonequilibrium electron dynamics in noble metals', Physical Review B - Condensed Matter and Materials Physics, vol. 61, no. 24, pp. 16956-16966.
Del Fatti N, Voisin C, Achenmann M, Tzortzakis S, Christofilos D, Vallée F. Nonequilibrium electron dynamics in noble metals. Physical Review B - Condensed Matter and Materials Physics. 2000;61(24):16956-16966.
Del Fatti, N. ; Voisin, C. ; Achenmann, M. ; Tzortzakis, Stylianos ; Christofilos, D. ; Vallée, F. / Nonequilibrium electron dynamics in noble metals. In: Physical Review B - Condensed Matter and Materials Physics. 2000 ; Vol. 61, No. 24. pp. 16956-16966.
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