Carrier removal in n-type GaAs layers by oxygen implantation analysed by positron annihilation spectroscopy
Bibliographic record
Abstract
An n-doped layer in SI GaAs has been formed by silicon implantation and thermal activation. The subsequent removal of the charge carriers by multiple energy oxygen implantation has been analysed using positron annihilation spectroscopy. This technique allows lattice damage, and in particular vacancy-type defects, to be probed in the implanted region at concentrations ranging from 10/sup 16/-10/sup 19/ cm/sup -3/. Damage levels have been measured for a range of annealing temperatures and compared to the sheet resistivity of the implanted layer. The insensitivity of the positrons to the implanted oxygen provides the capability of analysing the contribution of the vacancy type defects to the isolation. These results highlight the applicability of the positron technique to the study of other materials requiring implant isolation.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".