Influence of epitaxial strain on the ferromagnetic semiconductor<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>EuO</mml:mi></mml:mrow></mml:math>: First-principles calculations
Bibliographic record
Abstract
From first-principles calculations we investigate the electronic structure and the magnetic properties of $\mathrm{EuO}$ under hydrostatic stress and the appropriate biaxial stress for epitaxial films. There is a complex interdependence of the $\mathrm{O}\phantom{\rule{0.3em}{0ex}}2p$ and $\mathrm{Eu}\phantom{\rule{0.3em}{0ex}}4f$ and $5d$ bands on the magnetism in $\mathrm{EuO}$, and decreasing lattice parameters is an ideal method to increase the Curie temperature ${T}_{c}$. Compared to hydrostatic pressure, the out-of-plane compensation that is available to epitaxial films diminishes this increase in ${T}_{c}$, although the ${T}_{c}$ increase is nonetheless significant due to the small value of Poisson's ratio for $\mathrm{EuO}$. We find the semiconducting gap closes at a 6% in-plane lattice compression for epitaxy, at which point a significant conceptual change must occur in the active exchange mechanisms.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.001 |
| 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) | 0.004 | 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 source (direct Gemma or distilled Codex), 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".