Direct observation of distinct minibands in moiré superlattices

Xie, Saien; Faeth, Brendan; Tang, Yanhao; Li, Lizhong; Parzyck, Christopher; Chowdhury, Debanjan; Zhang, Yahui; Jozwiak, C.; Bostwick, Aaron; Rotenberg, Eli; Shan, Jie; Mak, Kin Fai; Shen, Kyle

doi:10.48550/arxiv.2010.07806

2020

DOI: 10.48550/arxiv.2010.07806

|View full text |Cite

Preprint

Direct observation of distinct minibands in moiré superlattices

Saien Xie¹,

Brendan Faeth²,

Yanhao Tang³

et al.

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...

Citation Types

Supporting

Mentioning

Contrasting

Year Published

2022

2024

Publication Types

Select...

Article2

Relationship

Self Cite0

Independent2

Authors

Journals

Cited by 2 publications

(1 citation statement)

References 41 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…We deduce that the satellite spots are replicas of the CB minimum related to the moirépattern. Similar moire-related replicas of the VB have been reported in the photoemission from WSe 2 under graphene 43 and WS 2 under graphene 44 and interpreted in terms of miniband formation.…”

supporting

confidence: 79%

Conduction Band Replicas in a 2D Moiré Semiconductor Heterobilayer

Graham,

Park,

Nguyen

et al. 2024

Nano Lett.

View full text Add to dashboard Cite

Stacking monolayer semiconductors creates moireṕ atterns, leading to correlated and topological electronic phenomena, but measurements of the electronic structure underpinning these phenomena are scarce. Here, we investigate the properties of the conduction band in moiréheterobilayers of WS 2 /WSe 2 using submicrometer angle-resolved photoemission spectroscopy with electrostatic gating. We find that at all twist angles the conduction band edge is the K-point valley of the WS 2 , with a band gap of 1.58 ± 0.03 eV. From the resolved conduction band dispersion, we deduce an effective mass of 0.15 ± 0.02 m e . Additionally, we observe replicas of the conduction band displaced by reciprocal lattice vectors of the moirésuperlattice. We argue that the replicas result from the moirépotential modifying the conduction band states rather than final-state diffraction. Interestingly, the replicas display an intensity pattern with reduced 3-fold symmetry, which we show implicates the pseudo vector potential associated with in-plane strain in moiréband formation.

show abstract

supporting

confidence: 79%

Conduction Band Replicas in a 2D Moiré Semiconductor Heterobilayer

Graham,

Park,

Nguyen

et al. 2024

Nano Lett.

View full text Add to dashboard Cite

show abstract

Dry pick-and-flip assembly of van der Waals heterostructures for microfocus angle-resolved photoemission spectroscopy

Masubuchi

Sakano

Tanaka

et al. 2022

Sci Rep

View full text Add to dashboard Cite

We present a dry pick-and-flip assembly technique for angle-resolved photoemission spectroscopy (ARPES) of van der Waals heterostructures. By combining Elvacite2552C acrylic resin and 1-ethyl-3-methylimidazolium ionic liquid, we prepared polymers with glass transition temperatures (Tg) ranging from 37 to 100 ℃. The adhesion of the polymer to the 2D crystals was enhanced at $${T}_{\text{g}}$$ T g . By utilizing the difference in $${T}_{\text{g}}$$ T g , a 2D heterostructure can be transferred from a high-$${T}_{\text{g}}$$ T g polymer to a lower-$${T}_{\text{g}}$$ T g polymer, which enables flipping its surface upside down. This process is suitable for assembling heterostructures for ARPES, where the top capping layer should be monolayer graphene. The laser-based micro-focused ARPES measurements of 5-layer WTe2, 3-layer MoTe2, 2-layer WTe2/few-layer Cr2Ge2Te6, and twisted double bilayer WTe2 demonstrate that this process can be utilized as a versatile sample fabrication method for investigating the energy spectra of 2D heterostructures.

show abstract

scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.

Contact Info

hi@scite.ai

10624 S. Eastern Ave., Ste. A-614

Henderson, NV 89052, USA

Blog Terms and Conditions API Terms Privacy Policy Contact Cookie Preferences Do Not Sell or Share My Personal Information

Made with 💙 for researchers

Part of the Research Solutions Family.

Direct observation of distinct minibands in moiré superlattices

Cited by 2 publications

References 41 publications

Conduction Band Replicas in a 2D Moiré Semiconductor Heterobilayer

Conduction Band Replicas in a 2D Moiré Semiconductor Heterobilayer

Dry pick-and-flip assembly of van der Waals heterostructures for microfocus angle-resolved photoemission spectroscopy

Contact Info

Product

Resources

About