Tunneling spectroscopy of graphene using planar Pb probes

Yanjing Li, Nadya Mason

Research output: Contribution to journalArticlepeer-review


We show that evaporating lead (Pb) directly on graphene can create high-yield, high-quality tunnel probes, and we demonstrate high magnetic field/low temperature spectroscopy using these probes. Comparisons of Pb, Al, and Ti/Au probes show that after oxidation a well-formed self-limited tunnel barrier is created only between the Pb and the graphene. Tunneling spectroscopy using the Pb probes manifests energy-dependent features such as scattering resonances and localization behavior and can thus be used to probe the microscopic electronics of graphene.

Original languageEnglish (US)
Article number023102
JournalApplied Physics Letters
Issue number2
StatePublished - Jan 14 2013

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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