Ultrafast relaxation dynamics of optically excited electrons in Ni3- -: art. no. 035425

被引：27

作者：

Pontius, N

Neeb, M

Eberhardt, W

Lüttgens, G

Bechthold, PS

机构：

[1] BESSY, D-12489 Berlin, Germany

[2] Forschungszentrum Julich, Inst Festkorperforsch, D-52425 Julich, Germany

来源：

PHYSICAL REVIEW B | 2003年 / 67卷 / 03期

关键词：

D O I：

10.1103/PhysRevB.67.035425

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Photon-induced ultrafast energy dissipation in small isolated Ni-3(-) has been studied by two-color pump-probe photoelectron spectroscopy. The time-resolved photoelectron spectra clearly trace the path from a single-electron excitation to a thermalized cluster via both inelastic electron-electron scattering and electron-vibrational coupling. The relatively short electron-electron-scattering time of 215 fs results from the narrow energy spread of the partially filled d levels in this transition-metal cluster. The relaxation dynamics is discussed in view of the cluster size and in comparison to the totally different relaxation behavior of s/p-metal clusters.

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