Story perspectives

Dielectric Environment Alters Superconductivity in Twisted Graphene

4/8/2026

Summary

Story summary

Superconductivity in twisted bilayer graphene is significantly influenced by the dielectric environment.
Unlike conventional superconductors, the material's behavior depends on environmental properties.
Placing twisted bilayer graphene over a strontium titanate substrate (SrTiO3) and altering the dielectric constant suppressed superconductivity.
A theoretical model attributes the pairing mechanism to Coulomb interactions, influenced by plasmons and phonons.

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Story summary

Superconductivity in twisted bilayer graphene is significantly influenced by the dielectric environment.
Unlike conventional superconductors, the material's behavior depends on environmental properties.
Placing twisted bilayer graphene over a strontium titanate substrate (SrTiO3) and altering the dielectric constant suppressed superconductivity.
A theoretical model attributes the pairing mechanism to Coulomb interactions, influenced by plasmons and phonons.