Theoretical Study of Plasmon Losses in Low-energy Photoemission Spectra
Theoretical Study of Plasmon Losses in Low-energy Photoemission Spectra
复制标题
低能光电发射光谱中等离子体激元损失的理论研究
DOI：
10.1380/ejssnt.2012.145
复制
发表时间：
2012
影响因子：
0.7
通讯作者：
T. Fujikawa
中科院分区：
文献类型：
--
作者：
Y. Ohori;H. Shinotsuka;M. Kazama;T. Fujikawa
We study the energy- and angular-dependence of bulk and surface plasmon losses in low- and intermediate-energy region (< 1000 eV), and investigate the applicability of the quantum Landau formula which can explain overall plasmon loss features accompanied by core level photoemission. As an example, we calculate the Al 2s photoemission in the photoelectron kinetic energy range from 60 to 1000 eV measured at normal to the surface and at small take-off angles (10° and 30°). For the normal emission the quantum Landau formula gives quite similar results to those without the high-enegy approximation even at 60 eV. On the other hand we observe the considerably large difference at the grazing angle emission (10°). Even at 30° we can safely apply the quantum Landau formula for the plasmon analyses above 250 eV. [DOI: 10.1380/ejssnt.2012.145]
