1 Department of Physics and Astronomy, Science and Technology, Aarhus University2 Interdisciplinary Nanoscience Center, Science and Technology, Aarhus University3 unknown4 Department of Physics and Astronomy, Science and Technology, Aarhus University
The temperature-dependent electronic structure and electron-phonon coupling of weakly doped supported graphene is studied by angle-resolved photoemission spectroscopy and ab initio molecular dynamics simulations. The electron-phonon coupling is found to be extremely weak, reaching the lowest value ever reported for any material. However, the temperature-dependent dynamic interaction with the substrate leads to a complex and dramatic change in the carrier density and type in graphene. These changes in the electronic structure are mainly caused by fluctuations in the graphene-substrate distance.
Physical Review B (condensed Matter and Materials Physics), 2012, Vol 86