Phonons in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">In</mml:mi></mml:mrow><mml:mrow><mml:mn>0.53</mml:mn></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Ga</mml:mi></mml:mrow><mml:mrow><mml:mn>0.47</mml:mn></mml:mrow></mml:msub></mml:mrow><mml:mi mathvariant="normal">A</mml:mi><mml:mi mathvariant="normal">s</mml:mi><mml:mo>/</mml:mo><mml:mi mathvariant="normal">I</mml:mi><mml:mi mathvariant="normal">n</mml:mi><mml:mi mathvariant="normal">P</mml:mi><mml:mn/><mml:mo>(</mml:mo><mml:mn>100</mml:mn><mml:mo>)</mml:mo><mml:mn/></mml:math>superlattices by infrared reflectance
Bibliographic record
Abstract
Polarized far infrared reflectance has been measured at oblique incidence for 11 ${\mathrm{In}}_{0.53}{\mathrm{Ga}}_{0.47}\mathrm{A}\mathrm{s}/\mathrm{I}\mathrm{n}\mathrm{P}$ superlattices grown lattice matched on InP(100) wafers by chemical beam epitaxy. Both the alloy layer thickness (0.25--20 nm) and number of periods (10--40) were varied. The spectra contained sharp reflectance peaks at the frequencies of the vertically propagating, zone-center, transverse optical (TO), and longitudinal (LO) optical phonons. The contributions of the individual phonon modes of the alloy layers were resolved using a generalized analysis procedure including GaAs-like, disorder induced, and InAs-like LO and TO phonons. A nonlinear variation of the alloy LO phonon frequencies with layer thickness was observed arising from phonon confinement in the alloy layers. From this result, the LO phonon in bulk InAs is predicted to exhibit anomalous dispersion. On both sides of the alloy layers we observed 0.6-nm-thick interface layers of significantly different alloy composition. Surprisingly for a lattice matched system, the InP layers exhibit a slight strain arising from the interface formation.
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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 | 0.009 | 0.005 |
| Meta-epidemiology (narrow) | 0.005 | 0.011 |
| Meta-epidemiology (broad) | 0.002 | 0.009 |
| Bibliometrics | 0.003 | 0.007 |
| Science and technology studies | 0.007 | 0.007 |
| Scholarly communication | 0.009 | 0.009 |
| Open science | 0.011 | 0.009 |
| Research integrity | 0.010 | 0.010 |
| Insufficient payload (model declined to judge) | 0.940 | 0.012 |
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; both teacher heads agree on what is shown here.
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".