Unveiling The Unconventional Superconductivity Via Cuprates and Twisted Bilayer Graphene

Abstract

Since the twentieth century, the exploration of superconducting material, a type of material that exhibits zero electrical resistance, has remained a paramount topic of inquiry within the scientific community seeing its excellent potential in bringing dramatical improvement to the material science and electric power and high-field magnet technology. However, earliest materials with superconducting aptitude requires extreme condition for critical temperature: It needs a temperature close to 0K, which is hard for application. This severe technical issue then led to an exploration to materials with higher temperature to reveal superconductivity. With decades of efforts, despite there are still arguments in working principle, new material like cooper oxide and iron-based material were found to have critical temperature higher than the limit predicted by Bardeen–Cooper–Schrieffer theory. However, recent experiment and accompanying working principle for the superconductivity of twisted layer graphene may suggest that it has greater potential in high temperature superconducting, due to its tunable property and relatively simpler working mechanism.