Semiconducting <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi>Cr</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:mi>BN</mml:mi></mml:mrow></mml:math> monolayer with antiferromagnetic order
Bibliographic record
Abstract
The key to the next-generation spintronic devices is to design above-room-temperature two-dimensional antiferromagnets with large magnetic moments and anisotropy energies. We propose a design strategy to maximize the utilization of $d$ electrons and the strong coupling of transition-metal atoms. The designed semiconducting ${\mathrm{Cr}}_{2}\mathrm{BN}$ monolayer consists of hexagonal ${\mathrm{Cr}}_{6}\mathrm{BN}$ tiles centered by BN dimers. Compared to isolated B or N atoms, the BN dimer in ${\mathrm{Cr}}_{2}\mathrm{BN}$ can reduce the charges donated by Cr atoms, whereas the short Cr-Cr distance favors strong direct-exchange coupling interaction. These features make the ${\mathrm{Cr}}_{2}\mathrm{BN}$ monolayer checkerboard antiferromagnetic with a high N\'eel temperature of 874 K, a large magnetic anisotropy energy of 103 \textmu{}eV/Cr, and a large magnetic moment of $3.79\phantom{\rule{0.16em}{0ex}}{\ensuremath{\mu}}_{\mathrm{B}}$. High structural stability, originating from the covalent BN dimer and Cr-B/N ionic bond, renders ${\mathrm{Cr}}_{2}\mathrm{BN}$ a good candidate for experimental synthesis.
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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 | 0.002 | 0.002 |
| Meta-epidemiology (narrow) | 0.001 | 0.002 |
| Meta-epidemiology (broad) | 0.001 | 0.002 |
| Bibliometrics | 0.000 | 0.002 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.002 | 0.002 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.104 | 0.013 |
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; both teacher heads agree on what is shown here.
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".