▎ 摘　　要

Spin transport in single layer graphene is studied in this work using a semiclassical Monte Carlo simulation, and a comparison is made to bi-layer graphene. Spin relaxation is modeled using the D'yakonov-Perel and Elliot-Yafet mechanisms. It is shown that bi-layer graphene has a higher spin relaxation length compared to single layer graphene, and this has also been observed experimentally. An explanation of this difference is given in terms of the band structures of the two materials. (C) 2011 American Institute of Physics. [doi: 10.1063/1.3622661]