Journal
MICROELECTRONICS JOURNAL
Volume 40, Issue 4-5, Pages 857-859Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.mejo.2008.11.019
Keywords
Graphene; Absorption; Spin-orbit interaction
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We present a quantitative analysis on the effect of the spin-orbit interaction in the optical absorption of pi-electrons in graphene. It has been shown that the optical absorption amplitude of graphene around the K point in the Brillouin zone has a node in the two-dimensional Brillouin zone of honeycomb lattice. We calculated the k-dependent absorption matrix by taking into account the finite spin-orbit interaction in graphene. It was found that the spin-orbit interaction lifts the nodes in the absorption matrix. Furthermore, in the terahertz frequency regime, the spin-orbit interaction can significantly enhance the optical absorption in graphene, by LIP to 100%. Crown Copyright (C) 2008 Published by Elsevier Ltd. All rights reserved.
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