Hollow Dislocation Cores

Dislocations with hollow cores actually do exist! In GaN and in SiC such defects have been observed.
The last word to hollow dislocation cores or "micropipes" is not yet out.
Some more informations can be found in a module discussing SiC in the Hyperscript "Semiconductors"
 

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go to 5.2.2 Stress Field of a Straight Dislocation

© H. Föll (Defects - Script)