Resonant tunneling in graphene-ferroelectric-graphene junctions

David Koprivica, Eran Sela

Research output: Contribution to journalArticlepeer-review

Abstract

We study tunnel junctions consisting of a two-dimensional ferroelectric material sandwiched between graphene electrodes. We formulate a theory for the interplay of the polarization and induced free charges in such devices, taking into account quantum capacitance effects. We predict a gate-sensitive voltage difference across the polar domains, which can be measured using electrostatic force microscopy. Incorporating this electrostatic theory in the tunneling current-voltage characteristics, we identify a resonance peak associated with aligned Dirac cones as a highly sensitive probe of the polarization. This opens the way for device applications with few atom-thick polar layers acting as readable ultra-high-density memory.

Original languageEnglish
Article number144110
JournalPhysical Review B
Volume106
Issue number14
DOIs
StatePublished - 1 Oct 2022

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