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Correlated insulator behaviour at half-filling in magic-angle graphene superlattices

Overview of attention for article published in Nature, March 2018
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About this Attention Score

  • In the top 5% of all research outputs scored by Altmetric
  • High Attention Score compared to outputs of the same age (99th percentile)
  • Good Attention Score compared to outputs of the same age and source (77th percentile)

Mentioned by

news
29 news outlets
blogs
7 blogs
twitter
44 tweeters
facebook
1 Facebook page
wikipedia
6 Wikipedia pages
reddit
1 Redditor

Citations

dimensions_citation
1119 Dimensions

Readers on

mendeley
1475 Mendeley
citeulike
2 CiteULike
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Title
Correlated insulator behaviour at half-filling in magic-angle graphene superlattices
Published in
Nature, March 2018
DOI 10.1038/nature26154
Pubmed ID
Authors

Yuan Cao, Valla Fatemi, Ahmet Demir, Shiang Fang, Spencer L. Tomarken, Jason Y. Luo, Javier D. Sanchez-Yamagishi, Kenji Watanabe, Takashi Taniguchi, Efthimios Kaxiras, Ray C. Ashoori, Pablo Jarillo-Herrero

Abstract

van der Waals heterostructures are an emergent class of metamaterials that consist of vertically stacked two-dimensional building blocks, which provide us with a vast tool set to engineer their properties on top of the already rich tunability of two-dimensional materials.1One of the knobs, the twist angle between different layers, has a crucial role in the ultimate electronic properties of a van der Waals heterostructure and does not have a direct analogue in other systems such as MBE-grown semiconductor heterostructures. For small twist angles, the moiré pattern that is produced by the lattice misorientation creates a long-range modulation. So far, the study of the effect of twist angles in van der Waals heterostructures has been mostly concentrated in graphene/hexagonal boron nitride twisted structures, which exhibit relatively weak interlayer interaction owing to the presence of a large bandgap in hexagonal boron nitride.2-5Here we show experimentally that when two graphene sheets are twisted by an angle close to the theoretically predicted 'magic angle' the resulting band structure near charge neutrality becomes flat owing to the strong interlayer coupling.6These flat bands exhibit insulating phases at half-filling, which are not expected in a non-interacting picture. We show that the half-filling states are consistent with a Mott-like insulator state that can arise from electrons localized in the moiré superlattice. These unique properties of magic-angle twisted bilayer graphene may open a new playground for exotic many-body quantum phases in a two-dimensional platform without magnetic field. The easy accessibility of the flat bands, the electrical tunability, and the bandwidth tunability though twist angle may pave the way towards more exotic correlated systems, such as unconventional superconductors or quantum spin liquids.

Twitter Demographics

The data shown below were collected from the profiles of 44 tweeters who shared this research output. Click here to find out more about how the information was compiled.

Mendeley readers

The data shown below were compiled from readership statistics for 1,475 Mendeley readers of this research output. Click here to see the associated Mendeley record.

Geographical breakdown

Country Count As %
Unknown 1475 100%

Demographic breakdown

Readers by professional status Count As %
Student > Ph. D. Student 459 31%
Researcher 221 15%
Student > Master 146 10%
Student > Bachelor 131 9%
Student > Doctoral Student 63 4%
Other 201 14%
Unknown 254 17%
Readers by discipline Count As %
Physics and Astronomy 708 48%
Materials Science 207 14%
Engineering 101 7%
Chemistry 67 5%
Chemical Engineering 11 <1%
Other 79 5%
Unknown 302 20%

Attention Score in Context

This research output has an Altmetric Attention Score of 274. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 17 April 2021.
All research outputs
#70,260
of 17,661,905 outputs
Outputs from Nature
#6,358
of 80,165 outputs
Outputs of similar age
#2,638
of 375,605 outputs
Outputs of similar age from Nature
#206
of 896 outputs
Altmetric has tracked 17,661,905 research outputs across all sources so far. Compared to these this one has done particularly well and is in the 99th percentile: it's in the top 5% of all research outputs ever tracked by Altmetric.
So far Altmetric has tracked 80,165 research outputs from this source. They typically receive a lot more attention than average, with a mean Attention Score of 90.1. This one has done particularly well, scoring higher than 92% of its peers.
Older research outputs will score higher simply because they've had more time to accumulate mentions. To account for age we can compare this Altmetric Attention Score to the 375,605 tracked outputs that were published within six weeks on either side of this one in any source. This one has done particularly well, scoring higher than 99% of its contemporaries.
We're also able to compare this research output to 896 others from the same source and published within six weeks on either side of this one. This one has done well, scoring higher than 77% of its contemporaries.