Strontium substitution as a low-pressure test of alkaline-earth sublattice involvement in Hg-1223 pressure-quench superconductivity
Fuente:
Zenodo
Gespeichert in:
| 1. Verfasser: | |
|---|---|
| Format: | Recurso digital |
| Veröffentlicht: |
Zenodo
2026
|
| Schlagworte: | |
| Online-Zugang: | |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| _version_ | 1866902175955812352 |
|---|---|
| author | Fenning, Nicholas Brian |
| author_facet | Fenning, Nicholas Brian |
| contents | <p>This paper presents a focused computational follow-up to the recent Deng and Chu (PNAS 2026) report of 151 K ambient-pressure superconductivity in pressure-quenched HgBa₂Ca₂Cu₃O₈₊δ. Building on the CADUCEUS framework, it argues that calcium-sublattice activation is at most a partial contributor to the reported 18 K gain, and turns that idea into a falsifiable low-pressure experimental test.</p> <p>The central prediction is that replacing Ca with isovalent Sr to form HgBa₂Sr₂Cu₃O₈₊δ should shift the relevant alkaline-earth phase-boundary window from roughly 30 GPa down to about 4 GPa, bringing the test into large-volume high-pressure synthesis conditions. The key signature is not simply a higher Tc, but an onset-like enhancement across the 3.5–4.5 GPa window rather than a smooth monotonic pressure response.</p> <p>A positive result would support alkaline-earth sublattice involvement in cuprate pressure-quench gain; a negative result would constrain that picture sharply and redirect attention toward CuO₂-plane physics or other mechanisms outside the present model.</p> |
| format | Recurso digital |
| id | zenodo_https___doi_org_10_5281_zenodo_19232345 |
| institution | Zenodo |
| language | |
| publishDate | 2026 |
| publisher | Zenodo |
| record_format | zenodo |
| spellingShingle | Strontium substitution as a low-pressure test of alkaline-earth sublattice involvement in Hg-1223 pressure-quench superconductivity Fenning, Nicholas Brian Deng & Chu, PNAS 2026 Hg-1223 pressure-quench superconductivity Sr substitution alkaline-earth sublattice CADUCEUS cuprate superconductors large-volume press falsification test high-pressure synthesis phase-boundary engineering isovalent substitution metastable superconductivity sublattice decomposition pressure-window prediction experimentally testable prediction <p>This paper presents a focused computational follow-up to the recent Deng and Chu (PNAS 2026) report of 151 K ambient-pressure superconductivity in pressure-quenched HgBa₂Ca₂Cu₃O₈₊δ. Building on the CADUCEUS framework, it argues that calcium-sublattice activation is at most a partial contributor to the reported 18 K gain, and turns that idea into a falsifiable low-pressure experimental test.</p> <p>The central prediction is that replacing Ca with isovalent Sr to form HgBa₂Sr₂Cu₃O₈₊δ should shift the relevant alkaline-earth phase-boundary window from roughly 30 GPa down to about 4 GPa, bringing the test into large-volume high-pressure synthesis conditions. The key signature is not simply a higher Tc, but an onset-like enhancement across the 3.5–4.5 GPa window rather than a smooth monotonic pressure response.</p> <p>A positive result would support alkaline-earth sublattice involvement in cuprate pressure-quench gain; a negative result would constrain that picture sharply and redirect attention toward CuO₂-plane physics or other mechanisms outside the present model.</p> |
| title | Strontium substitution as a low-pressure test of alkaline-earth sublattice involvement in Hg-1223 pressure-quench superconductivity |
| topic | Deng & Chu, PNAS 2026 Hg-1223 pressure-quench superconductivity Sr substitution alkaline-earth sublattice CADUCEUS cuprate superconductors large-volume press falsification test high-pressure synthesis phase-boundary engineering isovalent substitution metastable superconductivity sublattice decomposition pressure-window prediction experimentally testable prediction |
| url | https://doi.org/10.5281/zenodo.19232345 |