报告题目：Mapping Dirac Quasiparticles near Charged and Uncharged Impurities on Graphene

报 告 人：Victor Brar，加州大学伯克利分校

报告时间：10月26日下午4：00

报告地点：物理系三楼报告厅

报告摘要：The response of ultra-relativistic Dirac particles to a Coulomb potential is central to understanding a wide range of electronic phenomena in graphene. Previously, Coulomb interactions in graphene have been probed by spatially averaged techniques that have not yielded a consistent picture. In this talk I will discuss recent scanning tunneling spectroscopy measurements around charged and uncharged impurities on a graphene surface. These measurements show with sub-nm resolution how Dirac fermions screen a Coulomb potential on graphene, and from these measurements we are able to extract useful information about the electron-electron interactions in graphene. The implications of these measurements to intrinsic graphene properties and to future graphene devices will also be discussed.