Atomic scale displacement field induced by a near-Σ9 twin boundary in silicon
Bibliographic record
Abstract
The structure of a near-Σ9 symmetrical tilt boundary of a silicon bicrystal is observed at atomic scale by high-resolution transmission electron microscopy using the [0,1,1] common tilt axis. The experimentally observed positions of atomic rows nearby the boundary are compared to theoretically predicted row positions using an elastic displacement field u generated by a planar semicoherent interface containing a periodic array of edge DSC dislocations. These dislocations accommodate a small angular departure (1.70°) from the perfect Σ9 twin orientation, as a small-angle symmetrical tilt grain boundary accommodates the misorientation. The investigation includes a large region containing two successive dislocation cores (spacing 6.1 nm). A good agreement between the experimental and theoretical atomic rows is obtained, except in the vicinity of the dislocation cores. This observation shows that the elastic field of the DSC dislocation array behaves like that of a planar periodic semicoherent interface separating two different crystals: it does not generate a long-range displacement or rotation field.
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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".