SYMMETRY-SELECTED ELECTRON-ENERGY-LOSS SCATTERING IN DIAMOND

被引:39
作者
BATSON, PE
机构
[1] IBM Thomas J. Watson Research Center, Yorktown Heights
关键词
D O I
10.1103/PhysRevLett.70.1822
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
Inelastic electron scattering using a two-beam channeling condition is used for the first time to create excitations having selectable even or odd symmetry relative to an atom column. The method is first established using plasmon and interband scattering in diamond. Next, for the carbon Is absorption edge, scattering to modes having odd symmetry gives a strong exciton peak. Scattering to modes having even symmetry results in a depressed edge having no exciton peak in evidence.
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页码:1822 / 1825
页数:4
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