Dilute-antimonide GaSbN/GaN dots-in-wire heterostructures grown by molecular beam epitaxy: Structural and optical properties
Bibliographic record
Abstract
We have investigated the epitaxy of GaSbN/GaN dots-in-wire heterostructures on a Si substrate by plasma-assisted molecular beam epitaxy. The photoluminescence (PL) emission wavelength was tuned from UV to blue and green regions at room temperature by varying the antimony (Sb) composition in the dilute regime (Sb concentration < 1%). Structural analysis reveals clearly defined interfaces between quantum-confined crystalline GaSbN and GaN layers with negligible lattice mismatch. The PL spectra unveil the non-monotonic dependence of the peak energy and linewidth on the excitation power and temperature. This can be correlated with the contributions from both localized and free excitons, wherein localized states dominate at low temperature and low excitation power. The screening of the quantum-confined Stark effect in the electroluminescence measurement suggests the presence of a substantially weaker built-in electric field (<240 kV/cm) for the green light emission at an ∼531 nm wavelength compared to conventional InGaN/GaN quantum wells, which is attributed to significantly reduced lattice mismatch between dilute-Sb GaSbN and GaN.
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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) | 0.000 | 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".