The electronic properties of graphene on SrTiO<sub>3</sub> and Pt substrates

ORAL

Abstract

Interactions between two different materials sometimes provide a viable route towards the comprehension of intrinsic physical properties of each material and induce novel physical properties that do not exist in each material alone. We have investigated graphene on two different substrates, SrTiO3 and Pt, using angle-resolved photoemission spectroscopy. The electron band structure of graphene on SrTiO3 shows a deviation from the characteristic linearity that is not explained within the Fermi liquid theory. Such deviation is further enhanced with decreasing temperature revealing strong electron-electron interactions in graphene at low temperatures. Graphene on Pt also shows the characteristics of strong electron-electron interactions, despite the presence of Pt strongly influences the electronic properties of graphene. Our findings pave the way towards the possible realization of strong correlations between Dirac fermions in graphene.

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Presenters

  • Jinwoong Hwang

    • Pusan National University

Authors

  • Jinwoong Hwang

    • Pusan National University

  • Hyejin Ryu

    • Lawrence Berkeley National Lab
    • Lawrence Berkeley National Laboratory
    • Lawrence Berkeley Natl Lab

  • Hwihyeon Hwang

    • Pusan National University

  • Min-Jeong Kim

    • Pusan National University

  • Ji-Eun Lee

    • Pusan National University

  • Qin Zhou

    • University of Nebraska

  • Debin Wang

    • Lawrence Berkeley National Laboratory

  • Ankit Disa

    • Max Planck Inst Structure & Dynamics of Matter
    • Max Planck Institute for the Structure and Dynamics of Matter
    • Yale University
    • Condensed Matter Department, Max Planck Institute for Structure and Dynamics of Matter
    • Applied Physics, Yale University

  • Jonathan Denlinger

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

  • Yuegang Zhang

    • Tsinghua University

  • Alessandra Lanzara

    • University of California Berkeley
    • University of California
    • Univ of California - Berkeley
    • Physics Department - University California, Berkeley, Materials Sciences Division - Lawrence Berkeley National Laboratory
    • Materials Sciences Division, Lawrence Berkeley National Laboratory
    • University of California, Berkeley and Lawrence Berkeley National Laboratory
    • Department of Physics, Univ of California - Berkeley
    • Univ. of California - Berkeley

  • Sung-Kwan Mo

    • Lawrence Berkeley National Lab
    • Lawrence Berkeley Natl Lab
    • Lawrence Berkeley National Laboratory
    • Pohang Accelerator Laboratory
    • Advanced Light Source, Lawrence Berkeley National Laboratory

  • Choongyu Hwang

    • Pusan National University
    • Pusan Natl Univ