Sum Rules for the spin surface response of metal clusters within the time dependent local spin density approximation

被引：4
|
作者：
Serra, L [1 ]
Lipparini, E
机构：
[1] Univ Illes Balears, Dept Fis, E-07071 Palma de Mallorca, Spain
[2] Univ Barcelona, Dept Estructura & Constituents Mat, E-08028 Barcelona, Spain
[3] Univ Trento, Dipartimento Fis, Povo, Trento, Italy
来源：
ZEITSCHRIFT FUR PHYSIK D-ATOMS MOLECULES AND CLUSTERS | 1997年 / 42卷 / 03期
关键词：
D O I：
10.1007/s004600050358
中图分类号：
O64 [物理化学（理论化学）、化学物理学]; O56 [分子物理学、原子物理学];
学科分类号：
070203 ; 070304 ; 081704 ; 1406 ;
摘要：
We study surface spin collective modes of simple metallic clusters using a sum rule approach. We derive analytical expressions for the energy and cubic energy-weighted moments of the time-dependent local-spin-density approximation (TDLSDA) strength function. With these two moments we obtain a mean excitation energy of multipole spin modes and study its dispersion with cluster size up to very large sizes. The crucial roles played by the surface diffuseness and by correlation and kinetic energy effects on the resonance energies are stressed.
引用
收藏
页码：227 / 230
页数：4
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