Data for: Deterministic fabrication of graphene/hexagonal boron nitride moire superlattices
Abstract/Contents
- Abstract
The electronic properties of moire heterostructures depend sensitively on the relative orientation between layers of the stack.
For example, near-magic-angle twisted bilayer graphene (TBG) commonly shows superconductivity, yet a TBG sample with one of the graphene layers rotationally aligned to a hexagonal Boron Nitride (hBN) cladding layer provided the first experimental observation of orbital ferromagnetism. To create samples with aligned graphene/hBN, researchers often align edges of exfoliated flakes that appear straight in optical micrographs. However, graphene or hBN can cleave along either zig-zag or armchair lattice directions, introducing a 30 degree ambiguity in the relative orientation of two flakes. By characterizing the crystal lattice orientation of exfoliated flakes prior to stacking using Raman and second-harmonic generation for graphene and hBN, respectively, we unambiguously align monolayer graphene to hBN at a near-0 degrees, not 30 degrees, relative twist angle. We confirm this alignment by torsional force microscopy (TFM) of the graphene/hBN moire on an open-face stack, and then by cryogenic transport measurements, after full encapsulation with a second, non-aligned hBN layer. This work demonstrates a key step toward systematically exploring the effects of the relative twist angle between dissimilar materials within moire heterostructures.
Description
Type of resource | Dataset |
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Date modified | May 25, 2024; May 28, 2024 |
Publication date | May 24, 2024 |
Creators/Contributors
Author | Kamat, Rupini |
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Author | Sharpe, Aaron |
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Author | Pendharkar, Mihir | |
Author | Hu, Jenny |
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Author | Tran, Steven |
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Author | Zaborski Jr., Gregory | |
Author | Hocking, Marisa | |
Author | Finney, Joe | |
Author | Watanabe, Kenji |
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Author | Taniguchi, Takashi |
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Author | Kastner, Marc |
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Author | Mannix, Andrew |
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Author | Heinz, Tony F. |
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Author | Goldhaber-Gordon, David |
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Subjects
Subject | moire superlattice |
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Subject | Graphene |
Subject | Boron nitride |
Genre | Data |
Genre | Data sets |
Genre | Dataset |
Bibliographic information
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- User agrees that, where applicable, content will not be used to identify or to otherwise infringe the privacy or confidentiality rights of individuals. Content distributed via the Stanford Digital Repository may be subject to additional license and use restrictions applied by the depositor.
- License
- This work is licensed under a Creative Commons Attribution 4.0 International license (CC BY).
Preferred citation
- Preferred citation
- Kamat, R., Sharpe, A., Pendharkar, M., Hu, J., Tran, S., Zaborski Jr., G., Hocking, M., Finney, J., Watanabe, K., Taniguchi, T., Kastner, M., Mannix, A., Heinz, T., and , . (2024). Deterministic fabrication of graphene hexagonal boron nitride moire superlattices. Stanford Digital Repository. Available at https://purl.stanford.edu/np508hx1441. https://doi.org/10.25740/np508hx1441.
Collection
Stanford Research Data
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- rvkamat@stanford.edu
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