Growth of crack-free, carbon-doped GaN and AlGaN∕GaN high electron mobility transistor structures on Si (111) substrates by ammonia molecular beam epitaxy
Bibliographic record
Abstract
The growth of C-doped GaN epilayers on p-Si (111) substrates by ammonia molecular beam epitaxy is reported. Highly insulating and crack-free 1.5-μm-thick C-doped GaN layers have been prepared using ionized methane as the dopant source. Using such a template, AlGaN∕GaN two-dimensional electron gas structures with a mobility of 1260cm2∕Vs for a sheet carrier density of 1.24×1013cm−2 have been achieved at room temperature. Fabricated devices demonstrated an excellent pinch-off characteristic as revealed by an on-to-off ratio higher than four orders of magnitudes and by very low leakage current (10μA∕mm at VDS=20V).
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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) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 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".