# SCWiki research · 2026-W42

Graphene, nickelates and a single copper–oxygen plane

Selected: 2026-10-18. Sources checked: 2026-10-18.

Editorial selection across graphene, nickelates and cuprates, ordered by publication date. Not a popularity ranking or exhaustive literature feed.

Initial selection preserved from 18 October 2026. This is the starting archive, not a record of earlier weekly editions. Original source-check dates have not been refreshed by this migration.

## Probing broken time-reversal symmetry in graphene

Josephson interferometry in magic-angle twisted trilayer graphene reveals asymmetric interference and field-sweep hysteresis below about 0.8 K, beneath the superconducting onset near 2 K.

Why it matters: Phase-sensitive probes help connect interference measurements to candidate superconducting symmetries.

Evidence limits: The authors interpret these signatures as consistent with broken time-reversal symmetry; they do not uniquely establish a chiral pairing state.

Review scope: Publisher abstract and publication-status notice; no full-text or independent replication review.

[Phase-sensitive signatures of time-reversal-symmetry-breaking superconductivity in magic-angle twisted trilayer graphene](https://www.nature.com/articles/s41467-026-78374-3) · Nature Communications · Peer-reviewed · early version. Published: 2026-10-07. Checked: 2026-10-18. Version: Publisher record as checked on 2026-10-18.

Paper ID: doi:10.1038/s41467-026-78374-3. First recommended: 2026-W42.

[Two-dimensional superconductivity](https://jzis.org/scwiki/two-dimensional-interfaces)

## Interlayer coherence in superconducting nickelates

X-ray spectroscopy of protected (La,Pr)3Ni2O7 films links superconductivity to coherent interlayer orbital hybridization, with oxygen content and epitaxial strain tuning the electronic states.

Why it matters: A material-specific link between orbital coherence and superconductivity guides comparisons between nickelate samples.

Evidence limits: This film-specific evidence supports a multiorbital interpretation but does not by itself settle the pairing mechanism across nickelate families.

Review scope: Publisher abstract and bibliographic record; subscription full text and raw data not reviewed.

[Interlayer hybridization promotes superconductivity in bilayer nickelates](https://www.nature.com/articles/s41563-026-02750-z) · Nature Materials · Peer-reviewed article. Published: 2026-09-23. Checked: 2026-10-18. Version: Publisher record as checked on 2026-10-18.

Paper ID: doi:10.1038/s41563-026-02750-z. First recommended: 2026-W42.

[Nickelate superconductors](https://jzis.org/scwiki/nickelates)

## Superconductivity in a single copper–oxygen plane

Monolayer Bi-2201 retains superconductivity with one CuO2 plane, while controlled oxygenation reveals an intermediate anomalous metal and unusual scaling near the superconductor–insulator transition.

Why it matters: A single-plane platform helps isolate how dimensionality and oxygen tuning affect cuprate transport.

Evidence limits: The reported phase behavior concerns this material and tuning protocol; its zero-temperature interpretation is inferred from finite-temperature measurements.

Review scope: Publisher abstract and bibliographic record; subscription full text and raw data not reviewed.

[Superconducting 2D cuprate with a single CuO2 plane](https://www.nature.com/articles/s41586-026-10857-1) · Nature · Peer-reviewed article. Published: 2026-08-12. Checked: 2026-10-18. Version: Publisher record as checked on 2026-10-18.

Paper ID: doi:10.1038/s41586-026-10857-1. First recommended: 2026-W42.

[Cuprate superconductors](https://jzis.org/scwiki/cuprates)

## Subsequent notices

No subsequent notices recorded.

Snapshot revision: fd7fb1e69750f728d470. Representation revision: e667ac57b30d9f0fee58.