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Size-dependent dynamics in excited states of gold clusters: From oscillatory motion to photoinduced melting
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10.1063/1.2795727
/content/aip/journal/jcp/127/16/10.1063/1.2795727
http://aip.metastore.ingenta.com/content/aip/journal/jcp/127/16/10.1063/1.2795727
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

(Color) . (a) Experimental TRPE spectra shown as contour plots. The scale representing the photoelectron intensity is shown in Fig. 3. Lower panel: time delay range from . Upper panel: time delay range from . (b) Simulated TRPE spectra. Lower panel: time delay range from . Upper panel: time delay range from . (c) Geometry snapshots calculated for 30 trajectories. At , the atoms are still localized reflecting the trapezoidal geometry of the initial ground state. (d) Maximum of the experimental binding energy in eV as a function of time delay.

Image of FIG. 2.
FIG. 2.

(Color online) . TRPE spectrum of . The 20 and spectra have been recorded using an Nd:YAG probe laser (see text for details). The scale representing the photoelectron intensity is shown on the right side.

Image of FIG. 3.
FIG. 3.

(Color) . (a) Experimental TRPE spectra shown as contour plots. Lower panel: time delay range from . Upper panel: time delay range from . (b) The kinetic energy of the experimental peak maximum is plotted as a function of time. The data are fitted to an exponential function with a decay time of . (c) Simulated TRPE spectrum shown as a contour plot. (d) Calculated population dynamics of the excited state as a function of time obtained from 30 trajectories. Exponential fit corresponds to a lifetime of .

Image of FIG. 4.
FIG. 4.

(Color) . (a) Temporal evolution of the potential energy of , , and . (b) Calculated geometry snapshots for the 30 trajectories. Each point corresponds to the position of a single atom ( atoms in total). At , the initial conditions involve the ground state structure at room temperature. At , the atomic positions are blurred due to the meltinglike behavior.

Image of FIG. 5.
FIG. 5.

Lindemann indices for indicating a meltinglike transition at .

Image of FIG. 6.
FIG. 6.

(Color online) . (a) TRPE spectrum of . The scale representing the photoelectron intensity is shown on the right side. (b) Integrated time dependent photoelectron intensity as a function of time for . The fit yields an IC time of . (c) Kinetic energy of the peak maximum of as a function of time. The data are fitted to an exponential function with a decay time of .

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/content/aip/journal/jcp/127/16/10.1063/1.2795727
2007-10-26
2014-04-23
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Size-dependent dynamics in excited states of gold clusters: From oscillatory motion to photoinduced melting
http://aip.metastore.ingenta.com/content/aip/journal/jcp/127/16/10.1063/1.2795727
10.1063/1.2795727
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