Thermoelectric Power of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mrow><mml:mi mathvariant="normal">H</mml:mi><mml:mi mathvariant="normal">o</mml:mi><mml:mi mathvariant="normal">B</mml:mi><mml:mi mathvariant="normal">a</mml:mi><mml:mi mathvariant="normal">C</mml:mi><mml:mi mathvariant="normal">o</mml:mi></mml:mrow><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mi mathvariant="normal">O</mml:mi><mml:mn>5.5</mml:mn></mml:msub></mml:math>: Possible Evidence of the Spin Blockade in Cobaltites
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Bibliographic record
Abstract
Thermoelectric power measurements have been performed for an ordered oxygen-deficient perovskite, ${\mathrm{H}\mathrm{o}\mathrm{B}\mathrm{a}\mathrm{C}\mathrm{o}}_{2}{\mathrm{O}}_{5.5}$, in which the alternative layers of ${\mathrm{C}\mathrm{o}\mathrm{O}}_{6}$ octahedra and of $[{\mathrm{C}\mathrm{o}\mathrm{O}}_{5}{]}_{2}$ bipyramids are occupied by ${\mathrm{C}\mathrm{o}}^{3+}$ species. The $T$-dependent Seebeck coefficient $S$ shows a clear change of the conduction regime at the metal-insulator (MI) transition (${T}_{\mathrm{M}\mathrm{I}}\ensuremath{\sim}285\text{ }\text{ }\mathrm{K}$). The sign change of $S$ from $S<0$ to $S>0$ can be explained assuming that a spin state transition occurs at ${T}_{\mathrm{M}\mathrm{I}}$. In the metallic state, ${\mathrm{C}\mathrm{o}}^{2+}$ ${e}_{g}$ electrons are moving in a broad band on the background of high or intermediate spin ${\mathrm{C}\mathrm{o}}^{3+}$ species. In contrast, the insulating behavior may result from the ${\mathrm{C}\mathrm{o}}^{3+}$ spin state transition to a low-spin ${\mathrm{C}\mathrm{o}}^{3+}$ occurring in the octahedra. In this phase the transport would occur by hopping of the low-spin ${\mathrm{C}\mathrm{o}}^{4+}{t}_{2g}$ holes, whereas the high-spin ${\mathrm{C}\mathrm{o}}^{2+}$ electrons become immobilized due to a spin blockade.
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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 | 0.008 | 0.003 |
| Meta-epidemiology (narrow) | 0.003 | 0.006 |
| Meta-epidemiology (broad) | 0.002 | 0.006 |
| Bibliometrics | 0.002 | 0.005 |
| Science and technology studies | 0.005 | 0.005 |
| Scholarly communication | 0.005 | 0.006 |
| Open science | 0.009 | 0.006 |
| Research integrity | 0.005 | 0.005 |
| Insufficient payload (model declined to judge) | 0.695 | 0.006 |
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 it