Magnetic phase diagram of a two-orbital model for bilayer nickelates with varying doping
Bibliographic record
Abstract
Motivated by the discovery of bilayer nickelate superconductor La${}_{3}$Ni${}_{2}$O${}_{7}$, the authors investigate here magnetic phase diagrams with varying electronic densities $n$ in a bilayer 2\ifmmode\times\else\texttimes\fi{}2\ifmmode\times\else\texttimes\fi{}2 cluster. Rich magnetic states are observed, which can be understood by three main coupling mechanisms: (1) half-empty ferromagnetic (FM) coupling, (2) half-half antiferromagnetic (AFM) coupling, and (3) half-full FM coupling. At the half-filling case, the half-half mechanism leads to a robust (\ensuremath{\pi}, \ensuremath{\pi}, \ensuremath{\pi}) state. For the La${}_{3}$Ni${}_{2}$O${}_{7}$ ($n$=1.5) case, the AFM coupling is found to be strong along the $z$ axis, while the $x\phantom{\rule{0}{0ex}}y$ plane shows strong competition between AFM and FM tendencies.
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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 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.001 | 0.000 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.001 | 0.000 |
| Insufficient payload (model declined to judge) | 0.005 | 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".