Lithographic band structure engineering of graphene

Bjarke S. Jessen, Lene Gammelgaard, Morten R. Thomsen, David M. A. Mackenzie, Joachim D. Thomsen, José M. Caridad, Emil Duegaard, Kenji Watanabe, Takashi Taniguchi, Timothy J. Booth, Thomas G. Pedersen, Antti-Pekka Jauho, Peter Bøggild*

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

457 Downloads (Pure)

Abstract

Two-dimensional materials such as graphene allow direct access to the entirety of atoms constituting the crystal. While this makes shaping by lithography particularly attractive as a tool for band structure engineering through quantum confinement effects, edge disorder and contamination have so far limited progress towards experimental realization. Here, we define a superlattice in graphene encapsulated in hexagonal boron nitride, by etching an array of holes through the heterostructure with minimum feature sizes of 12-15 nm. We observe a magnetotransport regime that is distinctly different from the characteristic Landau fan of graphene, with a sizeable bandgap that can be tuned by a magnetic field. The measurements are accurately described by transport simulations and analytical calculations. Finally, we observe strong indications that the lithographically engineered band structure at the main Dirac point is cloned to a satellite peak that appears due to moiré interactions between the graphene and the encapsulating material.
Original languageEnglish
JournalNature Nanotechnology
Volume14
Pages (from-to)340-346
Number of pages8
ISSN1748-3387
DOIs
Publication statusPublished - 2019

Cite this

Jessen, Bjarke S. ; Gammelgaard, Lene ; Thomsen, Morten R. ; Mackenzie, David M. A. ; Thomsen, Joachim D. ; Caridad, José M. ; Duegaard, Emil ; Watanabe, Kenji ; Taniguchi, Takashi ; Booth, Timothy J. ; Pedersen, Thomas G. ; Jauho, Antti-Pekka ; Bøggild, Peter. / Lithographic band structure engineering of graphene. In: Nature Nanotechnology. 2019 ; Vol. 14. pp. 340-346.
@article{bf81cf96d1af4a03b7a3fea2486cdeca,
title = "Lithographic band structure engineering of graphene",
abstract = "Two-dimensional materials such as graphene allow direct access to the entirety of atoms constituting the crystal. While this makes shaping by lithography particularly attractive as a tool for band structure engineering through quantum confinement effects, edge disorder and contamination have so far limited progress towards experimental realization. Here, we define a superlattice in graphene encapsulated in hexagonal boron nitride, by etching an array of holes through the heterostructure with minimum feature sizes of 12-15 nm. We observe a magnetotransport regime that is distinctly different from the characteristic Landau fan of graphene, with a sizeable bandgap that can be tuned by a magnetic field. The measurements are accurately described by transport simulations and analytical calculations. Finally, we observe strong indications that the lithographically engineered band structure at the main Dirac point is cloned to a satellite peak that appears due to moir{\'e} interactions between the graphene and the encapsulating material.",
author = "Jessen, {Bjarke S.} and Lene Gammelgaard and Thomsen, {Morten R.} and Mackenzie, {David M. A.} and Thomsen, {Joachim D.} and Caridad, {Jos{\'e} M.} and Emil Duegaard and Kenji Watanabe and Takashi Taniguchi and Booth, {Timothy J.} and Pedersen, {Thomas G.} and Antti-Pekka Jauho and Peter B{\o}ggild",
year = "2019",
doi = "10.1038/s41565-019-0376-3",
language = "English",
volume = "14",
pages = "340--346",
journal = "Nature Nanotechnology",
issn = "1748-3387",
publisher = "Nature Publishing Group",

}

Jessen, BS, Gammelgaard, L, Thomsen, MR, Mackenzie, DMA, Thomsen, JD, Caridad, JM, Duegaard, E, Watanabe, K, Taniguchi, T, Booth, TJ, Pedersen, TG, Jauho, A-P & Bøggild, P 2019, 'Lithographic band structure engineering of graphene', Nature Nanotechnology, vol. 14, pp. 340-346. https://doi.org/10.1038/s41565-019-0376-3

Lithographic band structure engineering of graphene. / Jessen, Bjarke S.; Gammelgaard, Lene; Thomsen, Morten R.; Mackenzie, David M. A.; Thomsen, Joachim D.; Caridad, José M.; Duegaard, Emil; Watanabe, Kenji; Taniguchi, Takashi; Booth, Timothy J.; Pedersen, Thomas G.; Jauho, Antti-Pekka; Bøggild, Peter.

In: Nature Nanotechnology, Vol. 14, 2019, p. 340-346.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Lithographic band structure engineering of graphene

AU - Jessen, Bjarke S.

AU - Gammelgaard, Lene

AU - Thomsen, Morten R.

AU - Mackenzie, David M. A.

AU - Thomsen, Joachim D.

AU - Caridad, José M.

AU - Duegaard, Emil

AU - Watanabe, Kenji

AU - Taniguchi, Takashi

AU - Booth, Timothy J.

AU - Pedersen, Thomas G.

AU - Jauho, Antti-Pekka

AU - Bøggild, Peter

PY - 2019

Y1 - 2019

N2 - Two-dimensional materials such as graphene allow direct access to the entirety of atoms constituting the crystal. While this makes shaping by lithography particularly attractive as a tool for band structure engineering through quantum confinement effects, edge disorder and contamination have so far limited progress towards experimental realization. Here, we define a superlattice in graphene encapsulated in hexagonal boron nitride, by etching an array of holes through the heterostructure with minimum feature sizes of 12-15 nm. We observe a magnetotransport regime that is distinctly different from the characteristic Landau fan of graphene, with a sizeable bandgap that can be tuned by a magnetic field. The measurements are accurately described by transport simulations and analytical calculations. Finally, we observe strong indications that the lithographically engineered band structure at the main Dirac point is cloned to a satellite peak that appears due to moiré interactions between the graphene and the encapsulating material.

AB - Two-dimensional materials such as graphene allow direct access to the entirety of atoms constituting the crystal. While this makes shaping by lithography particularly attractive as a tool for band structure engineering through quantum confinement effects, edge disorder and contamination have so far limited progress towards experimental realization. Here, we define a superlattice in graphene encapsulated in hexagonal boron nitride, by etching an array of holes through the heterostructure with minimum feature sizes of 12-15 nm. We observe a magnetotransport regime that is distinctly different from the characteristic Landau fan of graphene, with a sizeable bandgap that can be tuned by a magnetic field. The measurements are accurately described by transport simulations and analytical calculations. Finally, we observe strong indications that the lithographically engineered band structure at the main Dirac point is cloned to a satellite peak that appears due to moiré interactions between the graphene and the encapsulating material.

U2 - 10.1038/s41565-019-0376-3

DO - 10.1038/s41565-019-0376-3

M3 - Journal article

VL - 14

SP - 340

EP - 346

JO - Nature Nanotechnology

JF - Nature Nanotechnology

SN - 1748-3387

ER -