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 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 | 0.001 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.002 | 0.001 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.000 | 0.001 |
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".