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Researchers have identified a counterintuitive mechanism where ionic liquids induce disorder in 2D materials, which paradoxically enhances Coulomb repulsion to stabilize a superconducting dome rather than inhibiting it. This finding provides a theoretical framework for understanding high-temperature superconductivity in systems like twisted bilayer graphene and cuprates by linking quenched charge fluctuations to the emergence of these quantum states. The work advances fundamental knowledge of how disorder can be leveraged to engineer specific quantum phases without relying on traditional charge modulation techniques.
Quantum disorder boosts superconductivity in 2D materials with ionic liquids

Ionic liquids induce disorder in 2D materials, surprisingly enhancing Coulomb repulsion and driving a superconducting dome, as seen in materials like twisted bilayer graphene.
Researchers at Dipartimento di Fisica, Universitá di Trento and Graphene Labs, Fondazione Istituto Italiano di Tecnologia have demonstrated a surprising link between disorder and superconductivity in two-dimensional materials. The work reveals that methods used to manipulate charge in these materials unexpectedly drive the system toward increased disorder, specifically an Anderson transition, rather than simply controlling electron flow. This induced disorder markedly enhances repulsive Coulomb interactions, suppressing the critical temperature and naturally forming a…
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