Observation of the J‐sheet of the Fermi surface of YbRh<sub>2</sub>Si<sub>2</sub>
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Bibliographic record
Abstract
Abstract We report a previously unobserved quantum oscillation frequency in YbRh 2 Si 2 . This is the first quantum oscillation that can definitely be assigned to the second of the two major sheets of the Fermi surface predicted by band structure calculations. These calculations have been done for two scenarios: the “large” Fermi surface, which includes the Yb 4 f ‐hole in the Fermi volume, and the “small” Fermi surface, which does not. Previously observed frequencies were interpreted in terms of a “large” Fermi surface that has been so strongly spin‐split that it closely resembles the “small” Fermi surface. The new frequency can also be incorporated into this picture, however there are some indications that the situation is more complicated than was assumed, suggesting a need for more advanced band structure calculations.
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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) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| 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.
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