Superconductivity and bosonic fluid emerging from moiré flat bands
Xu Zhang, Kai Sun, Heqiu Li, Gaopei Pan, Zi Yang Meng
Abstract
Here, the authors find a phenomenological theory of superconductivity in moir\'e flat band systems. With decreasing temperature, charge excitations are gapped, while charge excitations exist within the gap, shaping a bosonic fluid. Finite band width breaks the symmetry in these two-dimensional systems, making the bosonic fluid coherent and condense.
Topics & Concepts
SuperconductivityPhysicsCondensed matter physicsBosonPhase (matter)Cooper pairBand gapFermionQuantum fluidThermal fluctuationsSuperfluidityQuantum mechanicsPhysics of Superconductivity and MagnetismQuantum and electron transport phenomenaQuantum many-body systems