ABSTRACT
In crystalline solids, the interplay between topology and interactions can lead to various exotic topological correlated states, i.e., the recently discovered fractional Chern insulators (FCIs). Graphene based topological flat-bands provide a clean and highly tunable platform to investigate these states. In this talk, I will introduce our recent experiments on the observation of FCIs and other emergent correlated phenomena in rhombohedral hexalayer graphene (RHG)/hBN moiré superlattices. Such FCIs exhibit unconventional orbital magnetism and are extremely sensitive to in-plane magnetic field, indicating a non-neglectable spin-orbit coupling.
BIOGRAPHY
Xiaobo Lu received his B.S. degree in Physics from Shandong University in 2012 and his Ph.D. in Physics from the Institute of Physics, Chinese Academy of Sciences, in 2017. He subsequently conducted postdoctoral research at ICFO – The Institute of Photonic Sciences in Spain from 2017 to 2020, and at ETH Zurich from 2020 to 2021. In 2021, he joined the International Center for Quantum Materials (ICQM) at Peking University as an Assistant Professor.
Prof. Lu’s research focuses on emergent quantum phenomena in low-dimensional materials. His group employs advanced nanofabrication, quantum transport measurements, and optical spectroscopy to explore correlated electron behavior, unconventional superconductivity, and topological band structures in van der Waals heterostructures. Recently, Prof. Lu has carried out pioneering work on the transport studies of fractional quantum anomalous Hall effects in rhombohedral multilayer graphene systems.
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