The electronic properties of graphene on SrTiO3 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