Oblate equilibrium shapes of hemispheroidal atomic clusters

D. N. Poenaru; R. A. Gherghescu; A. V. Solov'yov; W. Greiner

doi:10.1209/0295-5075/88/23002

All issues

Volume 88 / No 2 (October 2009)

EPL, 88 2 (2009) 23002

Abstract

Issue		EPL Volume 88, Number 2, October 2009


Article Number		23002
Number of page(s)		4
Section		Atomic, Molecular and Optical Physics
DOI		https://doi.org/10.1209/0295-5075/88/23002
Published online		04 November 2009

EPL, 88 (2009) 23002

Oblate equilibrium shapes of hemispheroidal atomic clusters

D. N. Poenaru¹^,2, R. A. Gherghescu¹^,2, A. V. Solov'yov¹ and W. Greiner¹

¹ Frankfurt Institute for Advanced Studies (FIAS), J. W. Goethe Universität - Ruth-Moufang-Str. 1, D-60438 Frankfurt am Main, Germany, EU
² Horia Hulubei National Institute of Physics and Nuclear Engineering (IFIN-HH) RO-077125 Bucharest-Magurele, Romania, EU

Corresponding author: D.Poenaru@fias.uni-frankfurt.de

Received: 8 July 2009
Accepted: 7 October 2009

Abstract

The experimentally observed oblate equilibrium shapes of deposited atomic clusters are explained by simulating the interaction energy with the substrate. The surface tension on the contact area is multiplied with a factor, i, taking values in the interval $(-1.98, 2)$ . Minimization of the liquid-drop deformation energy of a sodium cluster allows to obtain a wide range of equilibrium shapes: hyperdeformed oblate hemispheroid (deformation δ = -1); superdeformed oblate hemispheroid (δ = -0.68); hemisphere (δ = 0); superdeformed prolate hemispheroid (δ = 0.63), and hyperdeformed prolate hemispheroid (δ = 0.97) for i = - 0.76, -0.58, 0, 1, and 2, respectively, almost independent of the number of atoms in the cluster.

PACS: 36.40.Qv – Stability and fragmentation of clusters / 71.45.-d – Collective effects / 61.46.Bc – Structure of clusters (e.g., metcars; not fragments of crystals; free or loosely aggregated or loosely attached to a substrate)

© EPLA, 2009

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.