Quasiparticle excitations of molecular chains on graphene

ORAL

Abstract

The ability to understand and control the electronic properties of molecular assemblies at the nanoscale is crucial for future technologies. In this talk, we study quasiparticle excitations of linear chains of F4-TCNQ molecules on graphene in a field-effect transistor setup and demonstrate the ability to control their charge state by means of the gate voltage. In particular, we employ ab initio density-functional theory and GW calculations to parametrize a model Hamiltonian which describes the adsorbed molecules as Anderson model impurities interacting via the screened Coulomb interaction. In agreement with recent scanning tunnelling experiments, our calculations predict a range of gate voltages at which every other molecule is occupied by an extra electron.

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Presenters

  • Johannes Lischner

    Materials, Imperial College London, Physics, Imperial College London, Department of Materials, Imperial College London, Departments of Physics and Materials, and the Thomas Young Centre for Theory and Simulation of Materials, Imperial College London

Authors

  • Johannes Lischner

    Materials, Imperial College London, Physics, Imperial College London, Department of Materials, Imperial College London, Departments of Physics and Materials, and the Thomas Young Centre for Theory and Simulation of Materials, Imperial College London

  • Hsin-Zon Tsai

    Physics, Univ of California - Berkeley, Univ of California - Berkeley, UCB, Physics, UC Berkeley, Physics, University of California, Berkeley, Department of physics, University of California - Berkeley

  • Jiong Lu

    Chemistry, National University of Singapore, Department of Chemistry, National University of Singapore

  • Arash Omrani

    Physics, UC Berkeley

  • Kenji Watanabe

    National Institute for Materials Science, NIMS, National Institute for Material Science, Advanced Materials Laboratory, National Institute for Materials Science, National Institute of Materials Science, Research Center for Functional Materials, National Institute for Materials Science, National Institute for Materials Science (NIMS, Advanced Materials Laboratory, NIMS, National Institute for Materials Science, Advanced Materials Laboratory, National Institue for Materials Science, National Institute of Material Science, National Institute for Matericals Science, Advanced Materials Laboratory, National Institute for Materials Science, 1-1 Namiki, Advanced materials laboratory, National institute for Materials Science, NIMS-Japan

  • Takashi Taniguchi

    National Institute for Materials Science, NIMS, Advanced Materials Laboratory, National Institute for Materials Science, Chemical Engineering, Kyoto Univ, Advanced materials laboratory, National institute for Materials Science

  • Steven Louie

    Physics, University of California, Berkeley, University of California, Berkeley, Physics, Univ of California - Berkeley, Univ of California - Berkeley, Physics, UC Berkeley, Physics Department, UC Berkeley and Lawrence Berkeley National Lab, Department of Physics, University of California at Berkeley and Materials Sciences Division, Lawrence Berkeley National Laboratory, Department of Physics, University of California, Berkeley, Physics Department, University of California Berkeley and Lawrence Berkeley National Lab, Department of physics, University of California - Berkeley, Lawrence Berkeley National Lab and University of California - Berkeley, Materials Sciences Division, Lawrence Berkeley National Laboratory & Department of Physics, University of California at Berkeley, UC Berkeley and Lawrence Berkeley National Lab, Physics, University of California - Berkeley

  • Alex Zettl

    UC Berkeley and LBNL, UC berkeley, Univ of California - Berkeley, Physics, UC Berkeley, Physics, University of California, Berkeley, University of California at Berkeley, Physics, University of California - Berkeley, Department of Physics, Univ of California - Berkeley

  • Michael Crommie

    Physics, Univ of California - Berkeley, UC Berkeley and LBNL, Univ of California - Berkeley, UCB, Physics, UC Berkeley, Physics, University of California, Berkeley, Department of physics, University of California - Berkeley, Physics, University of California - Berkeley