从“魔角”石墨烯到摩尔超晶格量子模拟器

From magic angle twisted bilayer graphene to moirésuperlattice quantum simulator

自从魔角石墨烯在实验上被证实以来,转角摩尔超晶格体系中存在的关联绝缘态和超导态吸引了大批科学家的目光,并发展出了一门新的科学分支—转角电子学.本文主要综述了最近转角摩尔超晶格体系在实验上的发展,包括转角双层石墨烯(TBG)、转角双层-双层石墨烯(TDBG)以及其他二维摩尔超晶格体系,并简单介绍了摩尔超晶格量子模拟器的概念.其中实验里浮现的关联绝缘态、超导态、以及铁磁态几乎囊括了近代凝聚态物理的几大热门话题,同时,逐步发展的二维摩尔超晶格量子模拟器研究也似乎有可能为强关联量子多体体系寻找一个突破口.

Since the correlated insulating states and superconductivity in magic angle twisted bilayer graphene were discovered,the twisted moirésuperlattice has attracted a wide range of research interest,and even has brought a new field,"twistronics",into being.In this review,we first give a history of experimentally discovering magic angle graphene and flat band,and then summarize the recent developments of twisted moirésuperlattice,including twisted graphene systems and TMDCs,and finally introduce a notion of moirésuperlattice quantum simulator.