February 1, 2020 at 7:00 pm

Physics Colloquium | Flat Bands in Flatlands, Feb. 21

The Physics & Astronomy Colloquium Series presents Jeanie Lau of The Ohio State University discussing “Flat Bands in Flatlands” on Friday, Feb. 21, at 4:10 p.m. in Clippinger Labs 194.

Photo of Jeanie Lau

Photo of Jeanie Lau

Abstract: In a flat band system, the charge carriers’ energy-momentum relation is very weakly dispersive. The resultant large density of states and the dominance of Coulomb potential energy relative to the kinetic energy often favor the formation of strongly correlated electron states, such as ferromagnetism, nematicity, antiferromagnetism, superconductivity, and charge density waves. The advent of two-dimensional (2D) materials and their heterostructures has ushered in a new era for exploring, tuning and engineering of flat band system.

Here I will present our results on transport measurements of high quality few-layer 2D material devices, including robust long distance spin transport through the antiferromagnetic state in graphene, intrinsic magnetism in few-layer graphene, and if time allows, tunable spin-orbit coupling in atomically thin semiconductors.

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