Strain-free ultrathin AlN epilayers grown directly on sapphire by high-temperature molecular beam epitaxy
Bibliographic record
Abstract
High-quality AlN ultrathin films on sapphire substrate were grown by molecular beam epitaxy using an in situ high-temperature annealing approach. From transmission electron microscopy studies, it was found that the AlN epilayers are strain relaxed within the first nm, thus growing nearly strain free. Many of the dislocations generated at the AlN/sapphire interface are reduced within the first 50 nm of growth. Epitaxial films grown directly on sapphire, which are ∼100 nm thick, show X-ray diffraction (002) and (102) rocking curve peaks with full widths at half maximum of less than 150 and 1400 arc sec, respectively, which are the narrowest linewidths reported for AlN of this thickness. Detailed photoluminescence studies further showed that such AlN epilayers exhibit relatively high luminescence efficiency and strong near-band edge emission without defect-related transitions.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
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) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 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".