Date:
Tue, 31/12/201312:00-13:30
Location:
Danciger B building, Seminar room
Scanning tunneling microscopy and spectroscopy of graphene: edge states, Van-Hove singularities and screening:
Scanning tunneling microscopy and spectroscopy (STM/STS) provides direct access to the Dirac fermion quasiparticles in graphene and their interactions - with the environment and with each other- through the local density of states. I will describe STM/STS experiments on graphene with emphasis on three results: a) the formation of Landau levels in a magnetic field and their evolution into edge states. b) tuning the band structure in twisted graphene layers. c) tuning screening by populating Landau levels – from cloaking to supercriticality.
Scanning tunneling microscopy and spectroscopy (STM/STS) provides direct access to the Dirac fermion quasiparticles in graphene and their interactions - with the environment and with each other- through the local density of states. I will describe STM/STS experiments on graphene with emphasis on three results: a) the formation of Landau levels in a magnetic field and their evolution into edge states. b) tuning the band structure in twisted graphene layers. c) tuning screening by populating Landau levels – from cloaking to supercriticality.