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 machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| 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 | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.002 | 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.
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 source (direct Gemma or distilled Codex), 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".