Gate Modulated Interaction Between Quantum Dots in a Graphene/hBN Heterostructure

ORAL

Abstract

Understanding interactions between atoms is fundamental in condensed matter systems. In heterostructures of graphene and hexagonal boron nitride (hBN) we are able to create taylormade quantum dots in a background of Dirac fermions. Recent studies have explored the nature of single quantum dots and how their behavior is influenced by the application of a perpendicular magnetic field. However, no efforts have been made towards understanding the interaction between a pair of Dirac fermion quantum dots. We will discuss and present spatially-resolved scanning tunneling spectroscopy studies performed on a pair of quantum dots. We will also show how their behaviour is influenced by changes in their shape, size, and separation attained through the modulation of an electrostatic backgate.

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Presenters

  • Eberth Quezada

    University of California, Santa Cruz, Physics, University of Califorrnia, Santa Cruz, Physics, University of California, Santa Cruz

Authors

  • Eberth Quezada

    University of California, Santa Cruz, Physics, University of Califorrnia, Santa Cruz, Physics, University of California, Santa Cruz

  • Frederic Joucken

    University of California, Santa Cruz, Physics, University of California, Santa Cruz

  • Zhehao Ge

    University of California, Santa Cruz, Physics, University of Califorrnia, Santa Cruz, Physics, University of California, Santa Cruz

  • John L Davenport

    University of California, Santa Cruz, Physics, University of Califorrnia, Santa Cruz, Physics, University of California, Santa Cruz

  • Takashi Taniguchi

    Advanced Materials Laboratory, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan, National Institute for Materials Science, Japan, National Institute for Materials Science (Japan), National Institute for Materials Science, NIMS, Kyoto University, National Institute for Materials Science, Namiki 1-1, Tsukuba, Ibaraki 305-0044, Japan., National Institute of Materials Science

  • 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

  • Jairo Velasco Jr.

    University of California, Santa Cruz, Physics, University of Califorrnia, Santa Cruz, Physics, University of California, Santa Cruz