Weak localization in graphene flakes
Weak localization in graphene flakes
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DOI：
10.1103/physrevlett.100.056802
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发表时间：
2008-02-08
影响因子：
8.6
通讯作者：
Savchenko, A. K.
中科院分区：
文献类型：
--
作者：
Tikhonenko, F. V.;Horsell, D. W.;Savchenko, A. K.
我们证明石墨烯中量子干涉的表现与传统二维系统中的量子干涉有很大不同。由于载流子的手性性质，它不仅对非弹性、相断裂散射敏感，而且对许多弹性散射过程也敏感。我们研究了不同样本和不同载流子密度（包括狄拉克区域）的弱局域化，并找到了决定它的特征率。我们展示了石墨烯薄片的形状和质量如何影响弹性率和非弹性率的值，并讨论了它们的物理起源。
We show that the manifestation of quantum interference in graphene is very different from that in conventional two-dimensional systems. Because of the chiral nature of charge carriers, it is not only sensitive to inelastic, phase-breaking scattering, but also to a number of elastic scattering processes. We study weak localization in different samples and at different carrier densities, including the Dirac region, and find the characteristic rates that determine it. We show how the shape and quality of graphene flakes affect the values of the elastic and inelastic rates and discuss their physical origin.