Specifically stacked graphene configurations can host multiple, distinct superconductivity phases that can be controlled dynamically

https://www.eurekalert.org/news-releases/1134084

"stacks of 4 or 5 2D, staircase-like rhombohedral graphene... the phases do not break down under strong magnetic fields, which destroy 0-resistance electron flow in standard materials... instead, perpendicular magnetic field enhances superconductivity, elevating transition from 55° mK to approximately 90° mK while allowing up to 60% more current... tunable dynamically using simple external electrical voltages... highly versatile platform for engineering next-generation reconfigurable quantum electronics"