Past Events

Abstract

Low dimensional materials constitute an exciting and unusually tunable platform for investigation of integer and fractional quantum Hall states. Here I will present our results on transport measurements of high quality few-layer graphene and black phosphorus devices. In grapehne, we observe long-distance spin transport through the antiferromagnetic quantum Hall state, substrate-induced band structure modification, and quantum parity effect at the charge neutrality point. In tetralayer graphene, we have observed a large intrinsic gap at half filling, up to 80 meV, that arises from electronic interactions in rhombohedral stacking, and multiple Lifshitz transitions in Bernal stacking. Lastly, I will discuss our observation of integer and fractional quantum Hall states in few-layer black phosphorus devices.

Biography

Chun Ning (Jeanie) Lau is a Professor in the Department of Physics at The Ohio State University. She received her BA in physics from University of Chicago in 1994, and PhD in physics from Harvard in 2001. She was a research associate at Hewlett Packard Labs in Palo Alto from 2002 to 2004, before joining University of California, Riverside in 2004 as an assistant professor. She was promoted to associate professor in 2009 and full professor in 2012. Starting January 2017 she moved to The Ohio State University. Her research focuses on electronic, thermal and mechanical properties of nanoscale systems, in particular, graphene and other two-dimensional systems.

Anyone interested is welcome to attend.