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Interlayer Registry Dictates Interfacial 2D Material Ferroelectricity.

Wei Cao1, Oded Hod1, Michael Urbakh1

  • 1Department of Physical Chemistry, School of Chemistry, The Raymond and Beverly Sackler Faculty of Exact Sciences and The Sackler Center for Computational Molecular and Materials Science, Tel Aviv University, Tel Aviv 6997801, Israel.

ACS Applied Materials & Interfaces
|December 15, 2022
PubMed
Summary
This summary is machine-generated.

Interlayer lattice registry governs ferroelectric response in layered materials. A new polarization registry index (PRI) quantifies this, simplifying analysis and predicting ferroelectricity in 2D materials.

Keywords:
TMDh-BNpolarizationregistry indexslidetronicstwistvdW

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Area of Science:

  • Condensed matter physics
  • Materials science
  • Nanotechnology

Background:

  • Ferroelectric response in layered materials is complex.
  • Interlayer sliding significantly influences this response.
  • A fundamental understanding of the underlying mechanisms is lacking.

Purpose of the Study:

  • To elucidate the relationship between interlayer lattice registry and ferroelectric response in layered materials.
  • To introduce a novel, intuitive measure for quantifying interfacial ferroelectricity.
  • To provide a tool for characterizing, rationalizing, and predicting ferroelectric phenomena in 2D materials.

Main Methods:

  • Analysis of interlayer lattice registry.
  • Development of the polarization registry index (PRI) as a geometric measure.
  • Application of PRI to existing experimental and computational data.

Main Results:

  • Ferroelectric response is dictated by interlayer lattice registry.
  • The polarization registry index (PRI) successfully describes the sliding polarization landscape.
  • PRI offers efficient characterization and rationalization of ferroelectric behavior.

Conclusions:

  • The polarization registry index (PRI) provides a fundamental understanding of 2D ferroelectricity.
  • PRI enables efficient analysis and prediction of controllable polarization in layered materials.
  • This work offers a new perspective on interfacial ferroelectricity in van der Waals heterostructures.