Abstract: 

　　The discovery of graphene two decades ago sparked a revolution in the study of 2D materials. Due to their inherently two-dimensional nature and Van der Waals interactions with other surfaces, 2D materials are highly sensitive to their environment. These unique characteristics have driven significant advancements in emergent functional quantum materials, particularly in combining graphene with complex oxides, including moiré heterostructures. In this talk, I will discuss several key achievements: Colossal room-temperature magnetoresistance in graphene on a terraced SrTiO₃ substrate achieved by introducing topographic corrugations; The realization of tunable spin-splitting energy in graphene on ferrimagnetic Tm₃Fe₅O₁₂; and our recent work on supermoiré lattices in graphene, where controlled alignment has led to the creation of topological flat bands and exploration of related correlated states. These findings highlight the potential of graphene-complex oxide moiré heterostructures in advancing future quantum materials and technologies.

Biography:

　　Dr. Hu Junxiong is a senior research fellow at the National University of Singapore (NUS). He received his Ph.D. from NUS in 2021 and continued his postdoctoral research at NUS. He was promoted to senior research fellow in 2023. He is currently leading a group of 2D materials under the guidance of Prof.Ariando at the physics department, focusing on the interface physics of 2D materials and functional oxides, especially the study of magnetism, ferroelectricity and superconducting proximity effects. So far, as an independent Principal Investigator (PI), he has secured funding for 2 national projects in Singapore totaling S$472,500.00 (approximately 2.5 million RMB). Junxiong has published 25 SCI academic papers, including 10 papers as the first/corresponding author, including Nature Materials, Nature Nanotechnology, Nature Communications and other well-known journals. He has won the Director's Award (2017), IEEE Gold Medalist (2020), Best Graduate Research Award (2021), Materials Research Society of Singapore medal (2022) and the Breakthrough Prize in NUS Physics (2023).