Graphene Superconductivity Insights
This is a UConn news story, published by Phys Org, that relates primarily to Volkov news.
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Searching for a universal principle for unconventional superconductivity
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UConn professor Pavel Volkov says graphene is great for studying superconductivity because it is clean and easy to control.
Volkov : At a so-called "magic" twist angle, quantum interference effects lead to the motion of elections slowing down enormously as they move through the layers of graphene, allowing them to interact much more strongly with one another.
The presence of strong interactions between the electrons unites these rather different materials.
In unconventional superconductors, electrons in twisted graphene pair in a non-uniform, or anisotropic way.
The conventional mechanisms of superconductivity, such as what is proposed in BCS theory, typically advocate for uniform isotropic pairing.
Volkov says they need to go back to the drawing board to develop a new theory of the superconducting state.