title: Size-dependent dynamics in excited states of gold clusters: from oscillatory motion to photoinduced melting.
abstract: Femtosecond time resolved photoelectron spectroscopy in combination with direct ab initio molecular dynamics "on the fly" based on density functional theory has been used to study the relaxation dynamics of optically excited states in small mass selected anionic gold clusters (Au(n) (-); n = 5-8). The nature of the dynamics strongly depends on the cluster size and structure. Oscillatory wavepacket motion (Au(5)(-)), a long lived excited state (Au(6)(-)), as well as photoinduced melting (Au(7)(-),Au(8)(-)) is observed in real time. This illustrates nonscalable properties of excited states in clusters in the size regime, in which each atom counts.
authors.affiliation: BESSY GmbH, Albert-Einstein-Strasse 15, 12489 Berlin, Germany.
authors.forename: Jörg
authors.initials: J
authors.lastname: Stanzel
authors.forename: Florian
authors.initials: F
authors.lastname: Burmeister
authors.forename: Matthias
authors.initials: M
authors.lastname: Neeb
authors.forename: Wolfgang
authors.initials: W
authors.lastname: Eberhardt
authors.forename: Roland
authors.initials: R
authors.lastname: Mitrić
authors.forename: Christian
authors.initials: C
authors.lastname: Bürgel
authors.forename: Vlasta
authors.initials: V
authors.lastname: Bonacić-Koutecký