Graphene-based superconductor created: it works even in powerful magnetic fields

Graphene is a plate that is a crystal lattice of two-dimensional carbon crystals.

The author of the new material, scientist Wallace, noticed the unusual properties of graphene in 1947.

Also, earlier researchers found out that the materialsgraphene-based are distinguished by unusual properties. For example, they were able to make an insulator-superconductor from graphene: the authors glued two pieces of this material at a certain angle (1.1 °) and got a moire pattern.

In the new work, the authors created a three-layer material that behaved completely differently than predicted by the classical theory of superconductivity.

It retained superconducting properties even whenscientists influenced him with magnetic fields of about 10 tesla. This is about two to three times the limit that other superconductors can withstand. As a rule, under such conditions they completely lose their properties and do not restore them even after the disappearance of the magnetic field.

Our material belongs to the so-calledspin triplet superconductors. Using materials of this kind, for example, it is possible to improve the operation of quantum computers. [We hope that] further experiments with three-layer graphene and other substances will allow us to create similar superconductors. This will be a big breakthrough in the field of quantum computing. 

Pablo Jarillo-Herrero, one of the developers, professor at the Massachusetts Institute of Technology

The authors believe that moiré graphene has such unusual properties because it is a superconductor in which pairs of bound electrons can occupy not one, but three different states.

The authors plan to continue studying the propertiesgraphene as a superconductor, and it is also hoped that the new discovery will be actively used for ultra-powerful magnetic resonance imaging systems, as well as quantum computers ideally protected from interference.

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