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Optimized Fabrication Procedure for High-Quality Graphene-based Moiré Superlattice Devices
Published on: July 11, 2025
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Switchable Asymmetric Moiré Patterns with Strongly Localized States
Zhigang Song1, Xiaotian Sun1,2, Linwang Wang1
1Computational Research Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States.
The Journal of Physical Chemistry Letters
|October 16, 2020
Summary
Researchers created switchable moiré patterns using indium selenide (InSe) and ferroelectric indium selenide (In2Se3). This breakthrough allows electronic structure control via electric fields, opening new possibilities for advanced electronic devices.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Nanotechnology
Background:
- Moiré patterns in 2D materials typically have fixed electronic structures.
- Controlling moiré pattern electronic properties is crucial for device applications.
Purpose of the Study:
- To investigate switchable moiré patterns formed by InSe and ferroelectric In2Se3.
- To explore the influence of ferroelectricity on moiré electronic structures and localized states.
- To analyze strong correlation effects in these switchable moiré systems.
Main Methods:
- Construction of moiré patterns using InSe and ferroelectric In2Se3 monolayers.
- Application of electric fields to switch moiré pattern properties.
- Utilizing a linear scaling computational method for large-scale simulations (approx. 10,000 atoms).
Main Results:
- Ferroelectricity in In2Se3 induces deep electron trap states.
- The moiré pattern's electronic structure is switchable via an applied electric field.
- Systematic study of electronic structures, localized state sizes, and correlation effects was performed.
Conclusions:
- Switchable moiré patterns offer tunable electronic properties.
- Ferroelectric materials provide a novel pathway for controlling moiré superlattices.
- This work paves the way for novel electronic devices with electric-field-controlled functionalities.
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