Electronic transport in graphene decorated with adatoms or nanoparticles

ORAL

Abstract

There is much interest in inducing a spin-orbit coupling into monolayer graphene in order to engineer the Kane-Mele Hamiltonian and thereby enable observation of the quantum spin Hall effect in graphene. Numerous adatoms have been studied toward this end. Here, we present measurements of monolayer graphene Hall bars with dilute coatings of either osmium adatoms or Bi2Te3 nanoparticles (NPs). With osmium adatoms, we find an unusual hole doping to occur, whereas most metals show electron doping. Nanoparticles of Bi2Te3 have recently been reported to yield possibly quantized transport [1]. We use high quality NPs, monodispersed with diameters of ~15 nm. Transport is studied after depositing the nanoparticles, and again after an argon anneal to remove the polyvinylidene fluoride coating on the NPs. In this case a small electron doping response is observed. Further measurements on higher density coatings of both osmium adatoms and Bi2Te3 nanoparticles will be discussed.
[1] K. Hatsuda, H. Mine, T. Nakamura, J. Li, R. Wu, S. Katsumoto, J. Haruyama, arXiv:1806.07027, (2018)

–

Presenters

  • Jamie Elias

    Department of Physics, Washington University in St. Louis, 1 Brookings Dr, St. Louis, MO 63130, Physics, Washington University, St. Louis

Authors

  • Jamie Elias

    Department of Physics, Washington University in St. Louis, 1 Brookings Dr, St. Louis, MO 63130, Physics, Washington University, St. Louis

  • Joshua Cohen

    Department of Physics, Washington University in St. Louis, 1 Brookings Dr, St. Louis, MO 63130, Physics, Washington University, St. Louis

  • Takashi Taniguchi

    National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305 0044, Japan, National Institute for Materials Science, Advanced Materials Laboratory, National Institute for Materials Science, , 1-1 Namiki, Tsukuba 305-0044, Japan, National Institute for Material Science, 1-1 Namiki, Tsukuba 305-0044, National Institute of Materials Science, NIMS, Japan, Advanced Materials Laboratory, NIMS, National Institute for Materials Science, Tsukuba, Japan, Advanced Materials Laboratory, National Institute for Materials Science, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan, National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0044, Japan, National Institute for Materials Science (NIMS), NIMS Tsukuba, NIMS, National Institute for Material Science, National Institute for Materials Science, Japan, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Japan, National Institute for Materials Science , Japan, Advanced Materials Laboratory, National Institute for Materials Science, Japan, Advanced Materials Laboratory, National Institute for Materials Science, Tsukuba, Ibaraki 305-0044, Japan, National Institute for Materials Science, Tsukuba, Ibaraki 305- 0044, Japan, National Institute for Material Science - Japan, National Institute for Materials Science, Namiki Tsukuba Ibaraki, Japan, National Institute of Material Science, Advanced Material Lab, NIMS, Advanced Materials Laboratory, National Institute for Materials Science, Tsukuba, Japan, Advanced Materials Laboratory, National Institute for Materials Science, Tsukuba, Ibaraki, Japan, National Institute for Materials Science, Tsukuba, 1-1 Namiki, Tsukuba, National Institute for Materials Science, NIMS/Tsukuba, National Institute for Materials Science, 1-1 Namiki, Tsukuba, 305-0044 Japan, National Institute for Materials Science, Namiki, 305-0044, Japan, National Institute for Material Science, Japan, Advanced Materials Laboratory, NIMS, Japan, Advanced Materials Labaratory, National Institute for Materials Science, National Institute of Material Science, 1-1 Namiki, Tsukuba, Ibaraki 205-0044, Japan, National Institute of Materials Science, Japan

  • Kenji Watanabe

    National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305 0044, Japan, Advanced Materials Laboratory, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan, National Institute for Materials Science, Advanced Materials Laboratory, National Institute for Materials Science, , 1-1 Namiki, Tsukuba 305-0044, Japan, National Institute for Material Science, 1-1 Namiki, Tsukuba 305-0044, National Institute of Materials Science, NIMS, Japan, Advanced Materials Laboratory, NIMS, National Institute for Materials Science, Tsukuba, Japan, National Institute for Materials Science, Japan, Advanced Materials Laboratory, National Institute for Materials Science, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan, National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0044, Japan, National Institute for Materials Science (NIMS), NIMS Tsukuba, National Institute for Materials Science (Japan), NIMS, National Institute for Material Science, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Japan, National Institute for Materials Science , Japan, National Institute for Materials Science, Namiki 1-1, Tsukuba, Ibaraki 305-0044, Japan., Advanced Materials Laboratory, National Institute for Materials Science, Japan, Advanced Materials Laboratory, National Institute for Materials Science, Tsukuba, Ibaraki 305-0044, Japan, National Institute for Materials Science, Tsukuba, Ibaraki 305- 0044, Japan, National Institute for Material Science - Japan, National Institute for Materials Science, Namiki Tsukuba Ibaraki, Japan, National Institute of Material Science, Advanced Material Lab, NIMS, Advanced Materials Laboratory, National Institute for Materials Science, Tsukuba, Japan, Advanced Materials Laboratory, National Institute for Materials Science, Tsukuba, Ibaraki, Japan, National Institute for Materials Science, Tsukuba, 1-1 Namiki, Tsukuba, National Institute for Materials Science, NIMS/Tsukuba, National Institute for Materials Science, 1-1 Namiki, Tsukuba, 305-0044 Japan, National Institute for Materials Science, Namiki, 305-0044, Japan, National Institute for Material Science, Japan, Advanced Materials Laboratory, NIMS, Japan, Columbia University, Advanced Materials Labaratory, National Institute for Materials Science, National Institute of Material Science, 1-1 Namiki, Tsukuba, Ibaraki 205-0044, Japan, National Institute of Materials Science, Japan

  • Fudong Wang

    Department of Chemistry, Washington University in St. Louis, 1 Brookings Dr, St. Louis, MO 63130, Chemistry, Washington University in St. Louis

  • William Buhro

    Department of Chemistry, Washington University in St. Louis, 1 Brookings Dr, St. Louis, MO 63130, Chemistry, Washington University in St. Louis

  • Arashdeep S Thind

    Department of Mechanical Engineering and Materials Science, Washington University in St. Louis, 1 Brookings Dr, St. Louis, MO 63130, Mechanical Engineering and Material Science, Washington University in St. Louis

  • Rohan Mishra

    Mechanical Engineering and Materials Science, Washington University in St. Louis, Department of Mechanical Engineering and Materials Science, Washington University in St. Louis, 1 Brookings Dr, St. Louis, MO 63130, Mechanical Engineering and Material Science, Washington University in St. Louis, Department of Mechanical Engineering and Material Science, Washington University in St. Louis

  • Erik Henriksen

    Department of Physics, Washington University in St. Louis, 1 Brookings Dr, St. Louis, MO 63130, Washington University in St. Louis, Washington Univ, Physics, Washington University, St. Louis, Washington University, St. Louis, Department of Physics, Washington University in St. Louis