Engineering of the electronic properties of an epitaxial graphene on an SiC(0001) substrate by manganese adatoms

ORAL

Abstract

The application of graphene in electronic devices requires an energy band gap with its remarkable properties. By using angle-resolved photoemission spectroscopy, we show that it is possible to decouple the graphene from substrate by manganese (Mn) intercalation concomitant with energy band gap opening. Upon introducing Mn adatoms, we observe a charge neutrality of the graphene band with energy band gap at the Dirac energy up to ~ 0.4 eV. In addition, the Mn-intercalated graphene shows fully screened energy-momentum dispersion as Mn 3d states play a role of a metallic background on graphene. These observations provides a viable route towards the engineering of the electronic properties of graphene.

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Presenters

  • Jinwoong Hwang

    • Lawrence Berkeley National Laboratory
    • Lawrence Berkeley National Lab
    • Physics, Pusan National University

Authors

  • Jinwoong Hwang

    • Lawrence Berkeley National Laboratory
    • Lawrence Berkeley National Lab
    • Physics, Pusan National University

  • Jieun Lee

    • Physics, Pusan National University

  • Minhee Kang

    • Physics, Pusan National University

  • Byeong-Gyu Park

    • Pohang Accelerator Laboratory

  • Jonathan Denlinger

    • Lawrence Berkeley National Laboratory
    • Advanced Light Source, Lawrence Berkeley National Laboratory
    • Advanced Light Source, Lawrence Berkeley National Lab
    • Advanced Light Source
    • Advanced Light Source, E. O. Lawrence Berkeley National Laboratory

  • Sung-Kwan Mo

    • Lawrence Berkeley National Laboratory
    • Lawrence Berkeley National Lab
    • Advanced Light Source, Lawrence Berkeley National Lab
    • Advanced Light Source, Lawrence Berkeley National Laboratory
    • ALS, Lawrence Berkeley National Laboratory

  • Choongyu Hwang

    • Physics, Pusan National University