Long Ju is a Lawrence and Sarah W. Biedenharn Career Development Associate Professor in the Physics Department at Massachusetts Institute of Technology. He joined as an assistant professor in January 2019. He received his B.S. in Physics in 2009 from Tsinghua University, China, and his Ph.D. in Physics in 2015 from the University of California, Berkeley. He then moved to Cornell University, where he was a Kavli postdoctoral fellow until December 2018.
Presentation Title:
Fractional Quantum Anomalous Hall Effect and Chiral Superconductivity in Graphene
Presentation Abstract:
Fractional quantum Hall effect and superconductivity are two famous examples of emergent quantum phenomena driven by electron topology and correlations. They usually happen in very different materials and experimental settings. In this talk, I will discuss how they can be unified in one crystalline material, known as rhombohedral graphene. More than being hosted by the same materials, the settings challenge the conventional understandings of these phenomena: the fractional quantum Hall effect happens at zero magnetic field, while the superconductor behaves as a spin and orbital magnet. These discoveries, realized in a particularly simple material system, provide great opportunities in quantum simulation and topological quantum computation.