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 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 | 0.006 | 0.002 |
| Meta-epidemiology (narrow) | 0.004 | 0.006 |
| Meta-epidemiology (broad) | 0.002 | 0.005 |
| Bibliometrics | 0.002 | 0.005 |
| Science and technology studies | 0.005 | 0.004 |
| Scholarly communication | 0.004 | 0.009 |
| Open science | 0.007 | 0.006 |
| Research integrity | 0.003 | 0.006 |
| Insufficient payload (model declined to judge) | 0.335 | 0.008 |
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".