Potential superconducting interfaces in polar <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi>A</mml:mi><mml:mi>B</mml:mi></mml:mrow><mml:msub><mml:mi mathvariant="normal">O</mml:mi><mml:mn>3</mml:mn></mml:msub><mml:mo>/</mml:mo><mml:mi>Ba</mml:mi><mml:mrow><mml:mo>(</mml:mo><mml:mi>Sr</mml:mi><mml:mo>)</mml:mo></mml:mrow><mml:msub><mml:mi mathvariant="normal">BiO</mml:mi><mml:mn>3</mml:mn></mml:msub></mml:math> heterostructures
Why this work is in the frame
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Bibliographic record
Abstract
We predict that interfacing the known superconducting oxide $\mathrm{Ba}(\mathrm{Sr}){\mathrm{BiO}}_{3}$ with a polar terminated perovskite oxide leads to a two-dimensional (2D) electron and/or hole gasses with a density similar to superconducting K-doped bismuthates. These interfaces have the potential for high-${T}_{\text{c}}$ superconductivity without the strong scattering present in randomly chemically substituted bismuthates. We present a detailed density functional theory (DFT) based study of the electronic structure of heterostructures involving polar 001 oriented ${\mathrm{LaLuO}}_{3}$ (LLO) and ${\mathrm{SrBiO}}_{3}$ (SBO) alternating layers. Beyond the thickness of four unit cells, 2D electron and hole gasses are formed at opposite interfaces of ${\mathrm{SrBiO}}_{3}$ with sheet charge densities on the order of ${10}^{14}\phantom{\rule{4pt}{0ex}}{\mathrm{cm}}^{\ensuremath{-}2}$. The electron and hole gasses exist around the $Y$ ($X$) and $M$ points of the Brillouin zone, respectively. The separation of the gasses and therefore their interactions can be regulated by the SBO layer thickness. This provides a platform in which charge density waves, excitonic insulators or condensates, and superconductors compete for the ground state with the potential for new physical properties including high-${T}_{\text{c}}$ superconductivity.
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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 | 0.007 | 0.009 |
| Meta-epidemiology (narrow) | 0.004 | 0.007 |
| Meta-epidemiology (broad) | 0.002 | 0.008 |
| Bibliometrics | 0.002 | 0.005 |
| Science and technology studies | 0.005 | 0.007 |
| Scholarly communication | 0.006 | 0.007 |
| Open science | 0.010 | 0.009 |
| Research integrity | 0.006 | 0.007 |
| Insufficient payload (model declined to judge) | 0.597 | 0.009 |
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