Resonant Inelastic X-Ray Scattering Study of Charge Excitations in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi mathvariant="normal">L</mml:mi><mml:msub><mml:mi mathvariant="normal">a</mml:mi><mml:mn mathvariant="normal">2</mml:mn></mml:msub><mml:mi mathvariant="normal">C</mml:mi><mml:mi mathvariant="normal">u</mml:mi><mml:msub><mml:mi mathvariant="normal">O</mml:mi><mml:mn mathvariant="normal">4</mml:mn></mml:msub></mml:math>
Bibliographic record
Abstract
We report a resonant inelastic x-ray scattering study of the dispersion relations of charge-transfer excitations in insulating $\mathrm{L}{\mathrm{a}}_{\mathrm{2}}\mathrm{C}\mathrm{u}{\mathrm{O}}_{\mathrm{4}}$. These data reveal two peaks, both of which show two-dimensional characteristics. The lowest energy excitation has a gap energy of $\ensuremath{\sim}2.2\text{ }\mathrm{e}\mathrm{V}$ at the zone enter, and a dispersion of $\ensuremath{\sim}1\text{ }\mathrm{e}\mathrm{V}$. The spectral weight of this mode becomes dramatically smaller around ($\ensuremath{\pi}$, $\ensuremath{\pi}$). The second peak shows a smaller dispersion ($\ensuremath{\sim}0.5\text{ }\mathrm{e}\mathrm{V}$) with a zone-center energy of $\ensuremath{\sim}3.9\text{ }\mathrm{e}\mathrm{V}$. We argue that these are both highly dispersive exciton modes damped by the presence of the electron-hole continuum.
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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) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.007 | 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 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".