Electronic Excitation‐Driven β‐Ga <sub>2</sub> O <sub>3</sub> Metastability Transformation and Self‐Organization Mechanism: β→κ/γ/δ Phases
Bibliographic record
Abstract
Abstract Irradiation‐driven multiphase self‐organization presents emergent opportunities for the customization of nanoscale engineering properties, dynamically tuning strain‐field distributions and interfacial electronic structures. Responding to intense electronic excitation‐induced energy deposition, the dominant phase transformations, with varying Gibbs free energy , are confirmed as β → κ → γ → δ that are located in specific microregions for Gallium (III) oxide (Ga 2 O 3 ), as follows: (i) Surface‐localized interstitial accumulation under compressive stress triggers β → δ via semi‐coherent interface formation. (ii) Tensile stress within latent tracks drives vacancy‐mediated oxygen layer truncation (4/12 periodicity along ⟨0001⟩), stabilizing coherent 4H (ABCB) κ and 3C (ABC) β (ABC) interfaces through strain‐compensated octahedral distortion. (iii) Screw dislocation‐mediated lattice relaxation induces β → γ via cation disordering (Ga 3 ⁺ occupancy at β ‐interstitial sites), forming metastable spinel γ with mixed occupancy across 16d/8a Wyckoff sites. Irradiation‐driven β ‐Ga 2 O 3 → κ/γ/δ transitions, as mechanistically revealed via inelastic thermal spike (i‐TS) calculations and molecular dynamics simulations, induce defect‐mediated nonlinear photoresponse, critical for optoelectronic engineering.
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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 | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.001 |
| 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".