Electronic properties and STM images of doped bilayer graphene

Stéphane-Olivier Guillaume, B. Zheng, J.-C. Charlier, L. Henrard

    Research output: Contribution to journalArticle

    38 Downloads (Pure)

    Abstract

    Electronic structures and scanning tunneling microscopy (STM) patterns of boron- and nitrogen-doped bilayer graphene are predicted using state-of-the-art first-principles calculations. Asymmetric doping is considered, leading to different charge-carrier densities on each graphene layer and to a band-gap opening. When lying on the top layer, the local STM patterns of the dopant are predicted to be similar to images observed in monolayer graphene. In contrast, the local electronic states of the buried dopant are not directly detectable by STM. However, by analyzing the charge transfer between graphene layers and its effect on the contrast of the STM image, the chemical doping is found to affect the symmetry (hexagonal and triangular) of the observed lattice for both the top doped surface and the buried doped layer. Consequently, our ab initio simulations predict a possible indirect detection of N or B dopants buried in bilayer graphene when such a contrast is revealed by a series of STM images or using scanning tunneling spectroscopy. © 2012 American Physical Society.
    Original languageEnglish
    JournalPhysical Review B
    Volume85
    Issue number3
    DOIs
    Publication statusPublished - 27 Jan 2012

    Fingerprint Dive into the research topics of 'Electronic properties and STM images of doped bilayer graphene'. Together they form a unique fingerprint.

  • Projects

    Equipment

  • Activities

    • 1 Participation to a Symposium, a study Day
    • 1 Participation in conference

    Kick-Off meeting. EU graphene Flahship

    Luc Henrard (Contributor)

    22 Oct 201423 Oct 2014

    Activity: Participating in or organising an event typesParticipation to a Symposium, a study Day

    Graphene 2013

    Luc Henrard (Speaker)

    25 Apr 2013

    Activity: Participating in or organising an event typesParticipation in conference

    Cite this