Pressure evolution of electronic and crystal structure of noncentrosymmetric <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mi>EuCoGe</mml:mi><mml:mn>3</mml:mn></mml:msub></mml:math>
Bibliographic record
Abstract
We report on the pressure evolution of the electronic and crystal structures of the noncentrosymmetric antiferromagnet ${\mathrm{EuCoGe}}_{3}$. Using a diamond anvil cell, we performed high pressure fluorescence detected near-edge x-ray absorption spectroscopy at the Eu ${L}_{3}$, Co $K$, and Ge $K$ edges and synchrotron powder x-ray diffraction. In the Eu ${L}_{3}$ spectrum, both divalent and trivalent Eu peaks are observed from the lowest pressure measurement ($\ensuremath{\sim}2$ GPa). By increasing pressure, the relative intensity of the trivalent Eu peak increases, and an average Eu valence continuously increases from 2.2 at 2 GPa to 2.31 at $\ensuremath{\sim}50$ GPa. On the other hand, no discernible changes are observed in the Co $K$ and Ge $K$ spectra as a function of pressure. With the increase in pressure, lattice parameters continuously decrease without changing $I4mm$ symmetry. Our study revealed a robust divalent Eu state and an unchanged crystal symmetry of ${\mathrm{EuCoGe}}_{3}$ against pressure.
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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 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.002 |
| Bibliometrics | 0.000 | 0.002 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.002 | 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".