High-pressure phase transition and metallization in Ar(<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mi>H</mml:mi><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>)<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mi/><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>
Why this work is in the frame
A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.
Bibliographic record
Abstract
The high-pressure phase transition and the metallization of Ar(${H}_{2}$)${}_{2}$ are investigated using first-principles methods. A phase transition from the experimentally observed MgZn${}_{2}$ structure to a CeCu${}_{2}$-type structure is predicted near 66 GPa. This phase transition provides a possible explanation for the disappearance of the Raman active vibron mode in experiment between 55 and 70 GPa. The metallization of the CeCu${}_{2}$ structure is promoted by the intermolecular interactions among ${H}_{2}$ molecules, but hindered by the modulation of Ar atoms. The competition between these two mechanisms implies that the pressure for metallization in Ar(${H}_{2}$)${}_{2}$ is higher than that suggested for pure hydrogen. This prediction is a result of an examination of a previous proposal that hydrogen could metallize at much lower pressure by mixing with Ar, and provides insight for future studies on metallization of hydrogen through the use of hydrogen-rich mixtures.
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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 | 0.005 | 0.003 |
| Meta-epidemiology (narrow) | 0.003 | 0.005 |
| Meta-epidemiology (broad) | 0.001 | 0.005 |
| Bibliometrics | 0.001 | 0.004 |
| Science and technology studies | 0.003 | 0.005 |
| Scholarly communication | 0.003 | 0.005 |
| Open science | 0.005 | 0.003 |
| Research integrity | 0.004 | 0.004 |
| Insufficient payload (model declined to judge) | 0.466 | 0.004 |
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 it