X-ray Photoelectron Spectroscopy Study of Rare-Earth Filled Skutterudites LaFe<sub>4</sub>P<sub>12</sub> and CeFe<sub>4</sub>P<sub>12</sub>
Bibliographic record
Abstract
The electronic structure of the rare-earth filled skutterudites LaFe 4 P 12 and CeFe 4 P 12 was examined by high-resolution core-line and valence-band X-ray photoelectron spectroscopy (XPS). From analysis of the binding energies and line shapes in the core-line spectra, the formulations (La 3+ )(Fe 2+ ) 4 (P - ) 12 and (Ce 3+ )(Fe 2+ ) 4 (P - ) 12 were obtained, with the electron deficiency being represented by a hole in the valence band. The occurrence of trivalent cerium was confirmed by the presence of a partially filled 4f state found in the valence band spectrum of CeFe 4 P 12 but not in LaFe 4 P 12 . The valence band spectra agree well with the density of states determined from band structure calculations. These spectra were fitted through a simple model in which component peaks are related to electron populations. Such an analysis gives atomic charges that are consistent with the formulations derived from the core-line spectra.
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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 | 0.000 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.002 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| 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.
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".