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ID 48643
file
creator
Hirahara, Taiki
Ebisuoka, Ryoya
Nakasuga, Tomoaki
Tajima, Shingo
Watanabe, Kenji
Taniguchi, Takashi
abstract
How atoms acquire three-dimensional bulk character is one of the fundamental questions in materials science. Before addressing this question, how atomic layers become a bulk crystal might give a hint to the answer. While atomically thin films have been studied in a limited range of materials, a recent discovery showing how to mechanically exfoliate bulk crystals has opened up the field to study the atomic layers of various materials. Here, we show systematic variation in the band structure of high mobility graphene with one to seven layers by measuring the quantum oscillation of magnetoresistance. The Landau fan diagram showed distinct structures that reflected differences in the band structure, as if they were finger prints of multilayer graphene. In particular, an even-odd layer number effect was clearly observed, with the number of bands increasing by one for every two layers and a Dirac cone observed only for an odd number of layers. The electronic structure is significantly influenced by the potential energy arising from carrier screening associated with a gate electric field.
description
This work was supported by MEXT KAKENHI Grant Number JP25107003.
journal title
Scientific Reports
volume
Volume 8
start page
13018
date of issued
2018-08-29
publisher
Nature Research
issn
2045-2322
publisher doi
language
eng
nii type
Journal Article
HU type
Journal Articles
DCMI type
text
format
appliation/pdf
text version
publisher
rights
© The Author(s) 2018. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
relation url
department
Graduate School of Advanced Sciences of Matter



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