Investigation of Bismuth films on two-dimensional ferromagnetic Fe3GeTe2 substrate

In recent years, with the introduction of graphene, research on the properties and applications of two-dimensional (2D) materials has developed rapidly. As the dimensionality decreases, the fluctuation and correlation effects of 2D materials are accompanied by many novel quantum states, such as fractional quantum Hall effect, charge density wave, high-temperature superconductivity effect, quantum phase transition and quantum critical phenomena. In particular, the 2D Xene and magnetic heterostructures have novel quantum states tunable with the interface structure and coupling strength, including topological surface states with chirality and topological magnetoelectric effects, etc., which have become important frontier topics in condensed matter physics and materials science. The interface of 2D Xene in heterostructure not only carries high-quality 2D electron gas, but also has topologically protected edge states, which makes such systems a promising new research area. In this doctoral research, the interfacial atomic and electronic properties of ultrathin bismuth and Fe3GeTe2 (FGT) heterostructure are explored, which will help us to understand the origin and properties of exotic quantum states in 2D magnetic and electronic heterostructures.