Plan-view image contrast of dislocations in GaN.
Journal Article
·
· Proposed for publication in Applied Physics Letters.
We demonstrate that when vertical threading dislocations in (0001) GaN are imaged in plan-view by transmission electron microscopy, a surface-relaxation contrast operates in addition to that due to the strain fields of dislocations passing through the specimen. We show that all three dislocation types (edge, screw, and mixed) can be detected in the same image using g = (11{bar 2}0) and 18{sup o} specimen tilt from [0001], allowing total densities to be assessed properly. The type of an individual dislocation can also be readily identified.
- Research Organization:
- Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC04-94AL85000
- OSTI ID:
- 927646
- Report Number(s):
- SAND2003-2243J; TRN: US200816%%1157
- Journal Information:
- Proposed for publication in Applied Physics Letters., Journal Name: Proposed for publication in Applied Physics Letters.
- Country of Publication:
- United States
- Language:
- English
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