Electron-phonon coupling in the high-pressure hcp phase of xenon: A first-principles study
Bibliographic record
Abstract
The electronic properties, lattice dynamics, and electron-phonon coupling (EPC) of the high-pressure hexagonal close-packed (hcp) phase of Xe have been examined by first-principles pseudopotential plane-wave calculations based on the density-functional perturbation theory. An electron topological transition is found around $200\phantom{\rule{0.3em}{0ex}}\mathrm{GPa}$. The EPC is shown to increase with pressure, reaching a maximum at $215\phantom{\rule{0.3em}{0ex}}\mathrm{GPa}$ with a predicted superconducting critical temperature of $0.04\phantom{\rule{0.3em}{0ex}}\mathrm{K}$ assuming a nominal Coulomb repulsion parameter $({\ensuremath{\mu}}^{*})$ of 0.1. The superconductivity is correlated with the nesting of Fermi surface. Investigation of the lattice dynamics reveals that acoustic vibrations, especially the longitudinal mode, dominate the EPC. The EPC strength was found to be strongly spatially anisotropic and localized.
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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 | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
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 teacher head, 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".