title: Peculiar Magnetotransport Features of Ultranarrow Graphene Nanoribbons under High Magnetic Field.
abstract: Through magnetotransport measurements, we investigate ultrasmooth graphene bilayer nanoribbons obtained by multiwall carbon nanotube unzipping, under a high magnetic field up to 55 T. The high quality of the samples allows us to observe a Hall quantization in ribbons as narrow as 20 nm. The presence, for certain samples, of isolated peaks in the resistance plateau is found to be related to a very moderate long-range disorder, which induces magnetic-field-dependent interedge scattering. Tight-binding numerical simulations of electron transport illustrate and confirm this picture. Our study provides important insights into the quantum Hall effect in quasi-1D systems and indicates possible lines for future investigations of the nonchiral edge states induced by zigzag nanoribbon sections.
authors.affiliation: National Laboratory of Solid State Microstructures, School of Electronic Science and Engineering, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University , Nanjing 210093, China.|Laboratoire National des Champs Magnétiques Intenses (LNCMI-EMFL), UPR 3228, CNRS-UJF-UPS-INSA , 143 Avenue de Rangueil, 31400 Toulouse, France.
authors.forename: Haoliang
authors.initials: H
authors.lastname: Shen
authors.affiliation: Université Grenoble Alpes, IMEP-LAHC , F-38016 Grenoble, France.|CNRS, IMEP-LAHC , F-38016 Grenoble, France.
authors.forename: Alessandro
authors.initials: A
authors.lastname: Cresti
authors.affiliation: Laboratoire National des Champs Magnétiques Intenses (LNCMI-EMFL), UPR 3228, CNRS-UJF-UPS-INSA , 143 Avenue de Rangueil, 31400 Toulouse, France.
authors.forename: Walter
authors.initials: W
authors.lastname: Escoffier
authors.affiliation: National Laboratory of Solid State Microstructures, School of Electronic Science and Engineering, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University , Nanjing 210093, China.
authors.forename: Yi
authors.initials: Y
authors.lastname: Shi
authors.affiliation: National Laboratory of Solid State Microstructures, School of Electronic Science and Engineering, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University , Nanjing 210093, China.
authors.forename: Xinran
authors.initials: X
authors.lastname: Wang
authors.affiliation: Laboratoire National des Champs Magnétiques Intenses (LNCMI-EMFL), UPR 3228, CNRS-UJF-UPS-INSA , 143 Avenue de Rangueil, 31400 Toulouse, France.
authors.forename: Bertrand
authors.initials: B
authors.lastname: Raquet
keywords: electronic transport; graphene nanoribbon; long-range impurity scattering; magnetotransport; quantum Hall effect; quasi-1D system