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Ohio State Study Reveals Key to Superconductivity in Graphene

4/15/2026

Summary

Story summary

Researchers at Ohio State University found that electron-electron repulsion is crucial for superconductivity in twisted bilayer graphene.
They used a high-dielectric substrate to manipulate interactions and showed that weakening repulsion collapses superconductivity.
At the 1.05-degree magic angle, electronic bands flatten, enabling strong interactions and multiple quantum phases.
The study implies that controlling the electromagnetic environment could advance superconductors, though superconductivity occurs below 0.8 kelvin and may reshape two-dimensional moiré systems.

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Story summary

Researchers at Ohio State University found that electron-electron repulsion is crucial for superconductivity in twisted bilayer graphene.
They used a high-dielectric substrate to manipulate interactions and showed that weakening repulsion collapses superconductivity.
At the 1.05-degree magic angle, electronic bands flatten, enabling strong interactions and multiple quantum phases.
The study implies that controlling the electromagnetic environment could advance superconductors, though superconductivity occurs below 0.8 kelvin and may reshape two-dimensional moiré systems.