Relaxation and collective excitations of cluster nano-plasmas. (27th November 2017)

• Record Type: Journal Article
• Authors: Reinholz, Heidi; Röpke, Gerd; Broda, Ingrid; Morozov, Igor; Bystryi, Roman; Lavrinenko, Yaroslav
• Is Part Of: Journal of physics. Volume 51:Number 1(2018:Jan. 01)
• Publication Date: 2017-11-27
• Subjects: collective excitation modes -- warm dense matter -- excited clusters -- current autocorrelation function -- molecular dynamics -- strongly coupled plasma; 36.40.Gk -- 36.40.Vz -- 52.27.Gr -- 52.65.Yy; Atoms -- Periodicals; Molecules -- Periodicals; Optics -- Periodicals; Nuclear physics -- Periodicals; 539.6
• DOI: 10.1088/1361-6455/aa9786
• Languages: English
• ISSNs: 0953-4075

Abstract

Abstract: Nano-plasmas produced, for example, in clusters after short-pulse laser irradiation, can show collective excitations, as derived from the time evolution of fluctuations in thermodynamic equilibrium. Molecular dynamical simulations are performed for various cluster sizes. New data are obtained for the minimum value of the stationary cluster charge. The bi-local autocorrelation function gives the spatial structure of the eigenmodes, for which energy eigenvalues are obtained. By varying the cluster size, starting from a few-particle cluster, the emergence of macroscopic properties such as collective excitations is shown.