A new theoretical model may help explain the shocking onset of superconductivity in stacked, twisted carbon sheets.
From my May 27, 2019, article in Quanta Magazine
The blockbuster discovery last year of superconductivity in a material called twisted bilayer graphene caught theorists off guard. None of them had even speculated about the sudden loss of all electrical resistance when two sheets of graphene — honeycomb lattices of carbon atoms — were stacked and twisted at a relative angle of 1.1 degrees. But one prominent proposal from Harvard University condensed matter theorists offers a detailed picture of what might be going on….Read more