Hemispheroidal atomic clusters on planar surfaces

作者：Gherghescu R A^*; Poenaru D N; Solovyov A; Greiner W

来源：Physica E: Low-Dimensional Systems and Nanostructures , 2010, 42(5): 1555-1562.

DOI：10.1016/j.physe.2009.12.044

• Deposited clusters
• Inert surfaces
• Shell model
• Shell corrections

The surface influence on deposited atomic clusters is accounted for as a change in the geometry of the free cluster from spheroidal to semispheroidal (oblate and prolate) shapes. The energy levels for the electrons are calculated using a deformed oscillator quantum well plus squared angular momentum half-cut by an infinite wall located at the surface. The level scheme is used to compute the shell corrections, to which a macroscopic liquid drop energy is added. Clear minima of the total deformation energy are obtained for semispheroids at the same deformation, within a range of atom number from 2 to 100. These minima are interpreted as stable structures of various magic numbers for deposited atomic clusters.

• 出版日期2010-3