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Publication Citation: Origin of Universal Optical Conductivity and Optical Stacking Sequence Identification in Multilayer Graphene

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Author(s): Hongki Min; Allan H. MacDonald;
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 ςuni=(π/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 ς (ω) =Nςuni 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
Pages: 4 pp.
Keywords: Graphene;Optical measurements
Research Areas: Nanophysics, Nanostructured Materials, Condensed Matter Physics, Nanoelectronics and Nanoscale Electronics, Nanomaterials, Optical Physics
PDF version: PDF Document Click here to retrieve PDF version of paper (297KB)