Fine optical spectroscopy of the 3.45 eV emission line in GaN nanowires
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Bibliographic record
Abstract
GaN nanowires grown by plasma-assisted molecular beam epitaxy are of excellent optical quality, their optical signature being characteristic of homogeneous strain-free GaN. There are however discrepancies between the low temperature luminescence spectra of GaN thin films and nanowires, in particular, a strong emission line around 3.45 eV in nanowires is not found with such a large intensity in thin film GaN. The origin of this emission line in nanowires is still debated; in this article, we shed new light on this debate notably by polarization-resolved luminescence and magneto-luminescence experiments. Our findings demonstrate, in particular, that this line cannot be attributed to a two-electron satellite of the donor bound exciton transition.
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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) | 0.000 | 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 it