Quantifying carbon site switching dynamics in GaN by electron holography
Off-axis electron holography is utilized to identify point defect reactions and quantify their dynamics by probing the time and temperature dependence of the Fermi level upon annealing. The methodology is illustrated using implanted carbon (C) in GaN, where a site switching phenomenon of C, from substitutional to interstitial, is found to be responsible for lifting the Fermi-level pinning in the lower part of the band gap. The carbon site switching process has an activation barrier energy of <a:math xmlns:a="http://www.w3.org/1998/Math/MathML"><a:mrow><a:mn>2.27</a:mn><a:mo>±</a:mo><a:mn>0.26</a:mn><a:mspace width="0.28em"/><a:mi>eV</a:mi></a:mrow></a:math>.
Authors
- J.‐F. Carlin
- R. Butté (ORCID: https://orcid.org/0000-0002-8474-217X)
- N. Grandjean (ORCID: https://orcid.org/0000-0003-3610-981X)
- Qianqian Lan (ORCID: https://orcid.org/0000-0002-9215-4925)
- Ph. Ebert (ORCID: https://orcid.org/0000-0002-2022-2378)
- Rafal E. Dunin–Borkowski (ORCID: https://orcid.org/0000-0001-8082-0647)
- M. Schnedler (ORCID: https://orcid.org/0000-0001-7904-8725)
- Kai Ji (ORCID: https://orcid.org/0000-0001-9048-7024)
Institutions
- Forschungszentrum Jülich (DE)
- Ernst Ruska Centre (DE)
- École Polytechnique Fédérale de Lausanne (CH)
Publication Details
- Journal
- Physical Review Research
- Published
- 2025-02-24
- DOI
- https://doi.org/10.1103/physrevresearch.7.013200
- Primary Topic
- GaN-based semiconductor devices and materials
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- Commissariat à l'Énergie Atomique et aux Énergies Alternatives