期刊
MICROSCOPY
卷 67, 期 -, 页码 -出版社
OXFORD UNIV PRESS
DOI: 10.1093/jmicro/dfx038
关键词
electron energy-loss spectroscopy; phonon excitation; aloof beam geometry
类别
资金
- Australian Research Council's Discovery Projects funding scheme [DP110102228, DP140102538]
- Alexander von Humboldt Foundation
Phonon energy-loss spectroscopy using electrons has both high resolution and low resolution components, associated with short-and long-range interactions, respectively. In this paper, we discuss how these two contributions arise from a fundamental quantum mechanical perspective. Starting from a correlated model for the atomic motion we show how short range 'impact' scattering and long range 'dipole' scattering arises. The latter dominates in aloof beam imaging, an imaging geometry in which radiation damage can be avoided.
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