Localization to delocalization probed by magnetotransport of hBN/graphene/hBN stacks in the ultra-clean regime

Abstract We report on magnetotransport in a high-quality graphene device, which is based on monolayer graphene (Gr) encapsulated by hexagonal boron nitride (hBN) layers, i.e., hBN/Gr/hBN stacks. In the vicinity of the Dirac point, a negative magnetoconductance is observed for high temperatures > ...

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Autores principales:	Takuya Iwasaki, Satoshi Moriyama, Nurul Fariha Ahmad, Katsuyoshi Komatsu, Kenji Watanabe, Takashi Taniguchi, Yutaka Wakayama, Abdul Manaf Hashim, Yoshifumi Morita, Shu Nakaharai
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/9d07d6a0875849adb74dc457f51188ac
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spelling	oai:doaj.org-article:9d07d6a0875849adb74dc457f51188ac2021-12-02T17:27:19ZLocalization to delocalization probed by magnetotransport of hBN/graphene/hBN stacks in the ultra-clean regime10.1038/s41598-021-98266-42045-2322https://doaj.org/article/9d07d6a0875849adb74dc457f51188ac2021-09-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-98266-4https://doaj.org/toc/2045-2322Abstract We report on magnetotransport in a high-quality graphene device, which is based on monolayer graphene (Gr) encapsulated by hexagonal boron nitride (hBN) layers, i.e., hBN/Gr/hBN stacks. In the vicinity of the Dirac point, a negative magnetoconductance is observed for high temperatures > ~ 40 K, whereas it becomes positive for low temperatures ≤ ~ 40 K, which implies an interplay of quantum interferences in Dirac materials. The elastic scattering mechanism in hBN/Gr/hBN stacks contrasts with that of conventional graphene on SiO2, and our ultra-clean graphene device shows nonzero magnetoconductance for high temperatures of up to 300 K.Takuya IwasakiSatoshi MoriyamaNurul Fariha AhmadKatsuyoshi KomatsuKenji WatanabeTakashi TaniguchiYutaka WakayamaAbdul Manaf HashimYoshifumi MoritaShu NakaharaiNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-6 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Takuya Iwasaki Satoshi Moriyama Nurul Fariha Ahmad Katsuyoshi Komatsu Kenji Watanabe Takashi Taniguchi Yutaka Wakayama Abdul Manaf Hashim Yoshifumi Morita Shu Nakaharai Localization to delocalization probed by magnetotransport of hBN/graphene/hBN stacks in the ultra-clean regime
description	Abstract We report on magnetotransport in a high-quality graphene device, which is based on monolayer graphene (Gr) encapsulated by hexagonal boron nitride (hBN) layers, i.e., hBN/Gr/hBN stacks. In the vicinity of the Dirac point, a negative magnetoconductance is observed for high temperatures > ~ 40 K, whereas it becomes positive for low temperatures ≤ ~ 40 K, which implies an interplay of quantum interferences in Dirac materials. The elastic scattering mechanism in hBN/Gr/hBN stacks contrasts with that of conventional graphene on SiO2, and our ultra-clean graphene device shows nonzero magnetoconductance for high temperatures of up to 300 K.
format	article
author	Takuya Iwasaki Satoshi Moriyama Nurul Fariha Ahmad Katsuyoshi Komatsu Kenji Watanabe Takashi Taniguchi Yutaka Wakayama Abdul Manaf Hashim Yoshifumi Morita Shu Nakaharai
author_facet	Takuya Iwasaki Satoshi Moriyama Nurul Fariha Ahmad Katsuyoshi Komatsu Kenji Watanabe Takashi Taniguchi Yutaka Wakayama Abdul Manaf Hashim Yoshifumi Morita Shu Nakaharai
author_sort	Takuya Iwasaki
title	Localization to delocalization probed by magnetotransport of hBN/graphene/hBN stacks in the ultra-clean regime
title_short	Localization to delocalization probed by magnetotransport of hBN/graphene/hBN stacks in the ultra-clean regime
title_full	Localization to delocalization probed by magnetotransport of hBN/graphene/hBN stacks in the ultra-clean regime
title_fullStr	Localization to delocalization probed by magnetotransport of hBN/graphene/hBN stacks in the ultra-clean regime
title_full_unstemmed	Localization to delocalization probed by magnetotransport of hBN/graphene/hBN stacks in the ultra-clean regime
title_sort	localization to delocalization probed by magnetotransport of hbn/graphene/hbn stacks in the ultra-clean regime
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/9d07d6a0875849adb74dc457f51188ac
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Localization to delocalization probed by magnetotransport of hBN/graphene/hBN stacks in the ultra-clean regime

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