Exchange Boson Dynamics in Cuprates: Optical Conductivity of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mi>HgBa</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mi>CuO</mml:mi><mml:mrow><mml:mn>4</mml:mn><mml:mo>+</mml:mo><mml:mi>δ</mml:mi></mml:mrow></mml:msub></mml:math>
Bibliographic record
Abstract
The electron-boson spectral density function ${I}^{2}\ensuremath{\chi}(\ensuremath{\Omega})$ responsible for carrier scattering of the high temperature superconductor ${\mathrm{HgBa}}_{2}{\mathrm{CuO}}_{4+\ensuremath{\delta}}$ (${T}_{c}=90\text{ }\text{ }\mathrm{K}$) is calculated from new data on the optical scattering rate. A maximum entropy technique is used. Published data on ${\mathrm{HgBa}}_{2}{\mathrm{Ca}}_{2}{\mathrm{Cu}}_{3}{\mathrm{O}}_{8+\ensuremath{\delta}}$ (${T}_{c}=130\text{ }\text{ }\mathrm{K}$) are also inverted and these new results are put in the context of other known cases. All spectra (with two notable exceptions) show a peak at an energy (${\ensuremath{\Omega}}_{r}$) proportional to the superconducting transition temperature ${\ensuremath{\Omega}}_{r}\ensuremath{\approx}6.3{k}_{B}{T}_{c}$. This charge channel relationship follows closely the magnetic resonance seen by polarized neutron scattering, ${\ensuremath{\Omega}}_{r}^{\mathrm{neutron}}\ensuremath{\approx}5.4{k}_{B}{T}_{c}$. The amplitudes of both peaks decrease strongly with increasing temperature. In some cases, the peak at ${\ensuremath{\Omega}}_{r}$ is weak and the spectrum can have additional maxima and a background extending up to several hundred meV.
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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 | 0.001 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.000 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.006 | 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".