The role of edge effects in magnetotransport measurements of graphene hall bars
ORAL
Abstract
The development of the Van der Waals (VdW) assembly technique has led to greatly improved bulk quality of graphene devices. However, little is known about the quality of the sample edge. Here we investigate how the nature of the sample edge affects transport measurements, particularly for the case of the quantum Hall effect regime where the chiral edge modes are presumed to be topologically protected and therefore insensitive to details of the edge. We compare in a single device the transport response along electrostatically-defined versus naturally occurring boundaries, and discuss possible implications for the measurement of boundary edge modes more generally.
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Presenters
Olivia Ghosh
Department of Physics, Columbia University
Authors
Olivia Ghosh
Department of Physics, Columbia University
Yihang Zeng
Department of Physics, Columbia University in the City of New York
Columbia University
Department of Physics, Columbia University
J.I.A. Li
Columbia University
Department of Physics, Brown University
Department of Physics, Columbia University
Brown University
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
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
