Self-assembled thulium silicide nanostructures on silicon(001) studied by scanning tunneling microscopy and transmission electron microscopy
Bibliographic record
Abstract
Since the formation of epitaxial silicide nanowires by deposition of rare earth (RE) metals on Si(001) was first discovered, intense interest has been focused on their growth mechanism. Unlike many of the other nanowire forming RE metals, which have several different polymorphic silicides at about the same stoichiometry, thulium forms three bulk silicides, Tm5Si3, TmSi, and Tm3Si5, with very different compositions and crystal structures. Due to their lattice mismatch anisotropy with the substrate when grown on the Si(001) surface, the latter two phases have the potential for nanowire formation. Scanning tunneling microscopy shows the formation of both nanowires and larger square islands. Cross-sectional high resolution transmission electron microscopy reveals both orthorhombic TmSi and hexagonal Tm3Si5, forming nanostructures either as connected neighboring structures or as overlapping structures. The coexistence of layers of both silicides in many nanostructures suggests a new mechanism for strain relief at the interface with the substrate.
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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) | 0.001 | 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 | 0.001 |
| 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".