Electronic structure of boron nitride single crystals and films
Bibliographic record
Abstract
We present a comparison between experimental soft x-ray spectra and density of states calculations of hexagonal boron nitride ($h$-BN) and cubic boron nitride ($c$-BN) single crystals. Cubic boron nitride films, grown on both mirror and scratched single crystal silicon wafers, have also been investigated using soft x-ray absorption spectroscopy (XAS) and soft x-ray emission spectroscopy (XES). Spectra measured at the $1s$ thresholds of boron and nitrogen give a complete picture of the occupied and unoccupied partial density of states for these materials. The films are shown to be a mixture of $s{p}^{3}$ bonded nanocrystalline $c$-BN phase and $s{p}^{2}$ bonded $h$-BN phase. As the roughness of the deposition surface increases, a decrease in the amount of $s{p}^{3}$ phase in the resulting film is observed. There are clear differences between the electronic structures of the nanocrystalline films and the single crystal samples. No differences between the spectra of the single crystals and previously reported measurements on powder samples of BN were observed.
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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".