Abstract
This study presents a statistically significant investigation of threading dislocations in α-Ga2O3 using high-resolution transmission electron microscopy. All the dislocations, observed end-on, exhibit a projected Burgers vector be = 1/3 ⟨1-100⟩, with data revealing that the dislocations fall into three categories: perfect mixed (b = 1/3 ⟨1-101⟩) dislocations and edge (b = ⟨1-100⟩ and b = 1/3 ⟨11-20⟩) dislocations which dissociate into combinations of b = 1/3 ⟨1-100⟩ partials. High-resolution analysis of the core region of the dislocations identifies that all the dislocations exhibit a similar 5-atom core, when looking at the cation sites. This is the first investigation of its kind in this material system, which will inform future work to, for example, understand the electronic properties of dislocations in α-Ga2O3 and other epitaxial corundum-structured materials.
Original language | English |
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Article number | 115018 |
Number of pages | 6 |
Journal | AIP Advances |
Volume | 14 |
Issue number | 11 |
DOIs | |
Publication status | Published - 14 Nov 2024 |
Funding
The authors acknowledge the support from the Engineering and Physical Sciences Research Council (EPSRC grants No. EP/M010589/1, EP/K014471/1).
Keywords
- α-Ga2O3
- transmission electron microscopy
- threading dislocations
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Data for "Atomic scale observation of threading dislocations in α-Ga2O3"
Mullen, R. (Creator), Roberts, J. (Creator), Chalker, P. (Creator), Oliver, R. (Creator), Hourahine, B. (Creator) & Massabuau, F. (Creator), University of Strathclyde, 15 Nov 2024
DOI: 10.15129/68379534-815b-448f-a7ca-a458750c944f
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