石墨烯中的电子自旋动力学和电子自旋共振
Electron spin dynamics and electron spin resonance in graphene
摘要：
本文提出了一种包含本征、Bychkov-Rashba和波纹自旋轨道耦合的石墨烯自旋弛豫理论。我们从Tombros等人[Nature 448，571（2007）]的自旋弛豫数据中发现。内禀自旋-轨道耦合的耦合常数为3.7 meV。虽然它是1-3个数量级大于从第一原理获得的，我们发现，其他蜂窝系统，MgB 2和LiC 6的可比值，后者在本文中研究的电子自旋共振（ESR）。我们预测，自旋相干性是更长的自旋垂直于石墨烯平面，这是有益的自旋电子学。我们确定实验条件时，体ESR是可实现的石墨烯。
英文摘要：
A theory of spin relaxation in graphene including intrinsic, Bychkov-Rashba, and ripple spin-orbit coupling is presented. We find from spin relaxation data by Tombros et al. [Nature 448, 571 (2007).] that intrinsic spin-orbit coupling dominates over other contributions with a coupling constant of 3.7 meV. Although it is 1-3 orders of magnitude larger than those obtained from first principles, we show that comparable values are found for other honeycomb systems, MgB2 and LiC6; the latter is studied herein by electron spin resonance (ESR). We predict that spin coherence is longer preserved for spins perpendicular to the graphene plane, which is beneficial for spintronics. We identify experimental conditions when bulk ESR is realizable on graphene.
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