If you stack two layers of graphene one on top of the other, and rotate them at an angle of 1.1º (no more and no less) from each other--the so-called 'magic-angle,' experiments have proven that the material can behave like an insulator, where no electrical current can flow, and at the same can also behave like a superconductor, where electrical currents can flow without resistance.
Contest between superconductivity and insulating states in 'magic angle' graphene
Phys.org - 7 Jul 2020 18:09
If you stack two layers of graphene one on top of the other, and rotate them at an angle of 1.1º (no more and no less) from each other--the so-called 'magic-angle,' experiments have proven that the material can behave like an insulator, where no electrical current can flow, and at the same can also behave like a superconductor, where electrical currents can flow without resistance.
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