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Lateral Heterostructures Fabricated via Artificial Pressure Gradient.

Chen Li1,2, Ke Liu2, Huacai Yan1

  • 1School of Materials Science and Engineering, Peking University, Beijing, 100871, China.

Advanced Materials (Deerfield Beach, Fla.)
|September 30, 2024
PubMed
Summary

Researchers developed a novel method using artificial pressure gradients in diamond anvil cells (DACs) to create lateral heterostructures. This technique successfully fabricated violet/blue and violet/black phosphorus heterostructures with distinct electrical properties.

Keywords:
black phosphoruslateral heterostructurespressure gradientviolet phosphorus

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Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • High-Pressure Science

Background:

  • Hydrostatic conditions are standard in high-pressure research to ensure material homogeneity.
  • Intrinsic pressure gradients in diamond anvil cells (DACs) can cause unwanted structural heterogeneity.

Purpose of the Study:

  • To propose a novel method for fabricating lateral heterostructures using artificial pressure gradients.
  • To demonstrate the controlled formation of distinct material phases within a single sample.

Main Methods:

  • Intentionally designing artificial pressure gradients within diamond anvil cells (DACs).
  • Utilizing the polymorphic transition of violet phosphorus under high pressure.
  • Fabricating lateral heterostructures by controlling pressure gradients.

Main Results:

  • Successfully prepared violet/blue and violet/black phosphorus lateral heterostructures.
  • Demonstrated that different structural phases emerge under tailored pressure gradients.
  • Achieved heterostructures with varying electrical properties.

Conclusions:

  • Artificial pressure gradients offer a portable and universal strategy for lateral heterostructure fabrication.
  • This method provides new insights into the preparation and regulation of lateral heterostructures.
  • The technique has broad applicability across various materials.