Interlayer Interaction and Electronic Screening in Multilayer Graphene Investigated with Angle-Resolved Photoemission Spectroscopy
Abstract
The unusual transport properties of graphene are the direct consequence of a peculiar band structure near the Dirac point. We determine the shape of the π bands and their characteristic splitting, and find the transition from two-dimensional to bulk character for 1 to 4 layers of graphene by angle-resolved photoemission. By detailed measurements of the π bands we derive the stacking order, layer-dependent electron potential, screening length, and strength of interlayer interaction by comparison with tight binding calculations, yielding a comprehensive description of multilayer graphene’s electronic structure.
- Publication:
-
Physical Review Letters
- Pub Date:
- May 2007
- DOI:
- Bibcode:
- 2007PhRvL..98t6802O
- Keywords:
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- 73.21.-b;
- 73.22.-f;
- 73.90.+f;
- 79.60.-i;
- Electron states and collective excitations in multilayers quantum wells mesoscopic and nanoscale systems;
- Electronic structure of nanoscale materials: clusters nanoparticles nanotubes and nanocrystals;
- Other topics in electronic structure and electrical properties of surfaces interfaces thin films and low-dimensional structures;
- Photoemission and photoelectron spectra