Work

Atomic scale observation of threading dislocations in α-Ga2O3

Year: 2024

Type: article

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=13⟨11̄00⟩, with data revealing that the dislocations fall into three categories: perfect mixed (b=13⟨11̄01⟩) dislocations and edge (b=⟨11̄00⟩ and b=13⟨112̄0⟩) dislocations, which dissociate into combinations of b=13⟨11̄00⟩ 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.

Source: AIP Advances

DOI: 10.1063/5.0235005

Authors: Ross Mullen, Joseph W. Roberts, Paul R. Chalker, Rachel A. Oliver, Ben Hourahine, Fabien C. P. Massabuau

Institutions: University of Strathclyde, University of Liverpool, University of Cambridge

Language: English

Topic: Ga2O3 and related materials

Subfield: Electronic, Optical and Magnetic Materials

Field: Materials Science

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $1,350

Funder: Engineering and Physical Sciences Research Council