Recently, I read some papers about EELS/STEM.
In these articles, the term of "channelling" occurred repeatedly, such as "channelling effect", " channelling contrast" and so on.
For contrast, I know there are mass/thickness contrast, diffraction contrast and phase contrast. However, in the book titled "Transmission electron microscopy: a textbook for materials science", I have not found any information about this "channelling".
So what is the exact meaning of “channelling“ ?
Any textbooks can be recommanded to read ?
Thanks
When the electron beam enters a crystalline specimen to cause the Bragg reflection of a low-order reflection plane, two Bloch waves are produced. One Bloch wave is localized on atomic columns and the other Bloch wave is localized between atomic columns. Since the latter Bloch wave does not strike atomic columns, this wave is better transmitted in the crystal than the former Bloch wave. This phenomenon is termed "electron channeling."
- Badges
- Science topic
- Similar topics
- Physical Sciences
- Materials Science