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Unraveling the rotational disorder of graphene layers in graphite

机译：揭示石墨中石墨烯层的旋转无序

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We present a study on the dependence of atomic mismatch between graphene sheets in graphite and the misorientation of the resulting superlattice domains. We demonstrate, through measurements of the atomic orientation of the top sheet and the angular misorientation between superlattice domains, that it is possible to compute the actual degree of atomic mismatch on the underlying graphene sheet. We show that the odd-even transition is evident for superlattices with relatively small periodicity in the range 1-2 nm and less apparent for those with larger periodicity in the range 5-8 nm, and present a signature of the transition. We also demonstrate that the degree of interlayer coupling between graphene sheets depends on the extent of rotational mismatch in relation to interlayer spacing as has previously been predicted.
机译：我们目前对石墨中石墨烯片之间原子错配的依赖性以及所得超晶格域的取向失调的研究。通过测量顶片的原子取向和超晶格域之间的角度错位，我们证明了可以计算出底层石墨烯片上原子错配的实际程度。我们表明，对于在1-2 nm范围内具有相对较小的周期性的超晶格，奇偶过渡是显而易见的，而在5-8 nm范围内具有较大周期性的那些超晶格，则不明显，并显示了跃迁的特征。我们还证明了石墨烯片之间的层间耦合程度取决于相对于层间间距的旋转失配程度，如先前所预测的。

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