Hemispheroidal atomic clusters on planar surfaces

被引：4
|
作者：
Gherghescu, R. A. [1 ,2 ]
Poenaru, D. N. [1 ]
Solovyov, A. [1 ]
Greiner, W. [1 ]
机构：
[1] Goethe Univ Frankfurt, Frankfurt Inst Adv Studies, D-60438 Frankfurt, Germany
[2] Horia Hulubei Natl Inst Phys & Nucl Engn NIPNE, Dept Theoret Phys, Bucharest, Romania
来源：
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES | 2010年 / 42卷 / 05期
关键词：
Deposited clusters; Inert surfaces; Shell model; Shell corrections; SHELL STRUCTURE; METAL-CLUSTERS;
D O I：
10.1016/j.physe.2009.12.044
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
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. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码：1555 / 1562
页数：8
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