The dielectric constant of a bilayer graphene interface

Ron Bessler, Urs Duerig, Elad Koren

Research output: Contribution to journalArticlepeer-review

Abstract

The interlayer relative dielectric constant, ϵr, of 2-dimensional (2D) materials in general and graphitic materials in particular is one of their most important physical properties, especially for electronic applications. In this work, we study the electromechanical actuation of nano-scale graphitic contacts. We find that beside the adhesive forces there are capacitive forces that scale parabolically with the potential drop across the sheared interface. We use this phenomena to measure the intrinsic dielectric constant of the bilayer graphene interface i.e. ϵr = 6 ± 2, which is in perfect agreement with recent theoretical predictions for multi-layer graphene structures. Our method can be generally used to extract the dielectric properties of 2D materials systems and interfaces and our results pave the way for utilizing graphitic and other 2D materials in electromechanical based applications.

Original languageEnglish
Pages (from-to)1702-1706
Number of pages5
JournalNanoscale Advances
Volume1
Issue number5
DOIs
StatePublished - 2019

All Science Journal Classification (ASJC) codes

  • General Engineering
  • General Chemistry
  • Bioengineering
  • Atomic and Molecular Physics, and Optics
  • General Materials Science

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