Interlayer interaction and electronic screening in multilayer graphene investigated with angle-resolved photoemission spectroscopy.
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 pi 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 pi 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.
Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA.
Taisuke
T
Ohta
Aaron
A
Bostwick
J L
JL
McChesney
Thomas
T
Seyller
Karsten
K
Horn
Eli
E
Rotenberg