Two Novel Approaches Based on the Thompson Theory and Shape Analysis for Determination of Equilibrium Structures of Nanoclusters: Cu8, Ag8 and Ag18 as study cases

Two new efficient methods for finding stable atomic clusters are introduced in this work. A purely algebraic and geometrical approach based on shape analysis provides a consistent set for optimization of structures which converge to local and global low-energy configurations. A second proposal based on the Thompson theory gives also candidate structures which became in equilibrium faster than the standard stochastic search models. The performance of the approaches is compared in three metal atomic clusters involving magic numbers. Both methods find the global and local low-energy structures reported in literature, but also obtain new structures. For Cu8, Ag8 and Ag18 the shape analysis method provides more structures than the approach based on Thompson theory. © Published under licence by IOP Publishing Ltd.

• Fecha de publicación: 2019
• Institución: Universidad de Medellín
• Repositorio: Repositorio UDEM
• Idioma: eng
• OAI Identifier: oai:repository.udem.edu.co:11407/5713
• Acceso en línea: http://hdl.handle.net/11407/5713
• Palabra clave: Equilibrium Structures; Metal Nanoclusters; Atomic beams; Engineering research; Metal analysis; Nanoclusters; Stochastic models; Stochastic systems; Equilibrium structures; Geometrical approaches; Low energy configurations; Low energy structures; Metal nanoclusters; New efficient method; Shape analysis method; Stochastic search; Structural optimization
• License: http://purl.org/coar/access_right/c_16ec