Probing Dirac Electron Physics in Graphitic Materials Webinar

Probing Dirac Electron Physics in Graphitic Materials – Aldrich Lecture at Cornell University

Overview

Electrons in monolayer graphene are described by massless Dirac electrons, which exhibit unique quantum phenomena due to the pseudospin and Berry phase of the massless electron. In this talk, Dr. Feng Wang will discuss his efforts in probing massive Dirac electrons in gapped bilayer graphene, which can be described by a quantum valley Hall insulator with non-trivial Chern number for individual valleys. He shows that a tunable bandgap up to 200 meV can be induced in bilayer graphene with electrical gating. In addition, he observed a topologically protected 1D conducting channel at the domain boundary of AB-BA bilayers, which can be attributed to the quantum valley Hall edge states in gapped bilayer graphene. He will also discuss one-dimensional plasmon arising from Luttinger liquid of Dirac electrons in metallic carbon nanotubes. The one-dimensional nanotube plasmon exhibits semi-quantized propagation speed and remarkable sub-wavelength spatial confinement.

Areas Covered in the Webinar

  • Carbon Nanomaterials
  • Graphene Electronics
  • Dirac Electrons
  • One-dimensional Plasmon

Who Should Watch?

  • Materials Scientists and Engineers focusing on Carbon Nanomaterials
  • Researchers focusing on Graphene Electronics and Graphene Optoelectronics
  • Physicists focusing on Graphene

Dr. Feng Wang
Associate Professor
The Ultrafast Nano-Optics Group
Department of Physics
University of California, Berkeley