| AVS 58th Annual International Symposium and Exhibition | |
| Graphene and Related Materials Focus Topic | Wednesday Sessions |
| Session GR-WeA |
| Session: | Graphene Characterization including Microscopy and Spectroscopy |
| Presenter: | David Siegel, University of California, Berkeley |
| Authors: | D.A. Siegel, University of California, Berkeley C.H. Park, University of California, Berkeley C.G. Hwang, Lawrence Berkeley National Laboratory J. Deslippe, University of California, Berkeley A.V. Fedorov, Lawrence Berkeley National Laboratory S.G. Louie, University of California, Berkeley A. Lanzara, University of California, Berkeley |
| Correspondent: | Click to Email |
Until recently it had been extremely difficult to experimentally address one of the most fundamental questions about graphene: How do the quasiparticles behave in neutral graphene, i.e. when the chemical potential coincides with the Dirac point energy? Here we address this question by investigating graphene on a particularly interesting substrate, the carbon face of SiC, with high-resolution angle-resolved photoemission spectroscopy (ARPES). We present the first direct measurements of the self-energy in graphene near the neutrality point, and show that the many-body physics in graphene differ from those of an ordinary metal. These exciting findings set a new benchmark in our understanding of many-body physics in graphene and a variety of novel materials with Dirac fermions.