Large-scale mesoscopic transport in nanostructured graphene

Haijing Zhang*, Jianming Lu, Wu Shi, Zhe Wang, Ting Zhang, Mingyuan Sun, Yuan Zheng, Qihong Chen, Ning Wang, Juhn-Jong Lin, Ping Sheng

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

23 Scopus citations

Abstract

Through exponential sample-size scaling of conductance, we demonstrate strong electron localization in three sets of nanostructured antidot graphene samples with localization lengths of 1.1, 2, and 3.4 μm. The large-scale mesoscopic transport is manifest as a parallel conduction channel to 2D variable range hopping, with a Coulomb quasigap around the Fermi level. The opening of the correlation quasigap, observable below 25 K through the temperature dependence of conductance, makes possible the exponential suppression of inelastic electron-electron scatterings and thereby leads to an observed dephasing length of 10 μm.

Original languageEnglish
Article number066805
Number of pages5
JournalPhysical Review Letters
Volume110
Issue number6
DOIs
StatePublished - 6 Feb 2013

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