EXCITATION OF QUASI-PARTICLES DURING GRAZING-ANGLE ION REFLECTION AT AL SURFACES

被引:13
作者
ZHENG, NJ [1 ]
RAU, C [1 ]
机构
[1] RICE UNIV,INST RICE QUANTUM,HOUSTON,TX 77251
来源
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A-VACUUM SURFACES AND FILMS | 1993年 / 11卷 / 04期
关键词
D O I
10.1116/1.578374
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
We have studied ion-induced electron emission during grazing-angle scattering of 150 keV protons at clean and oxygen-covered Al surfaces. The angle-resolved energy distribution of emitted electrons reveals, in the energy range of 0-30 eV, characteristic peaks, which are directly correlated to various electron excitation mechanisms. For clean Al surfaces, these processes include single electron excitation and excitation of electrons by decay of ion-excited surface and bulk plasmons. At submonolayer oxygen coverages of the Al surfaces, we already find a drastic decrease of the electron emission peak at 6 eV, which is due to the decay of surface plasmons, and an increase of the O(2s2p2p) Auger electron emission peak located at about 5 eV.
引用
收藏
页码:2095 / 2098
页数:4
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