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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|
|Research Areas:||Nanophysics, Nanostructured Materials, Condensed Matter Physics, Nanoelectronics and Nanoscale Electronics, Nanomaterials, Optical Physics|
|PDF version:||Click here to retrieve PDF version of paper (297KB)|