Publication Citation (NIST authors in bold)
Authors:	Min, H. , MacDonald, A. H.
Title:	Origin of Universal Optical Conductivity and Optical Stacking Sequence Identification in Multilayer Graphene
Published:	August 06, 2009
Abstract:	We predict that the optical conductivity of normal graphene multilayers is close to {sigma}uni=({pi}/2) e2/h per layer over a broad range of frequencies. The origin of this behavior is an emergent chiral symmetry which is present in normal N-layer stacks when small distant neighbor hopping amplitudes are neglected, and implies that {sigma} ({omega}) =N{sigma}uni in both low and high frequency limits. We discuss the possibility of obtaining useful information about stacking sequences from optical conductivity measurements.
Citation:	Physical Review Letters
Volume:	103
Issue:
Pages:	4 pp.
Keywords:	Graphene, Optical measurements
Research Area:	Condensed Matter Physics, Nanoelectronics and Nanoscale Electronics, Nanophysics, Nanostructured Materials, Optical Physics, Nanomaterials;
PDF version:	Click here to retrieve PDF version of paper (297 K)