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Published on: April 12, 2019
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Monolayer AsTe2 : Stable Robust Metal in 2D, 1D and 0D
S V Badalov1, A Kandemir2, H Sahin1,3
1Department of Photonics, Izmir Institute of Technology, 35430, Izmir, Turkey.
Summary
Density functional theory calculations reveal that 2D arsenic telluride (AsTe₂) structures, including monolayers, nanoribbons, and quantum dots, exhibit robust metallic properties. These findings highlight AsTe₂ as a promising material for nanodevice applications.
Area of Science:
- Materials Science
- Condensed Matter Physics
- Computational Chemistry
Background:
- Two-dimensional (2D) materials are extensively researched for novel electronic and nanoscale applications.
- Understanding the fundamental properties of emerging 2D materials like arsenic telluride (AsTe₂) is crucial for technological advancement.
Purpose of the Study:
- To investigate the structural, phononic, and electronic properties of monolayer AsTe₂ phases.
- To explore the stability and metallic characteristics of 2D, 1D, and 0D AsTe₂ structures.
- To assess the potential of AsTe₂ for nanodevice applications.
Main Methods:
- Density functional theory (DFT) calculations were employed.
- Total energy optimization and phonon dispersion calculations were performed to assess structural stability.
- Electronic band structure analysis was conducted to determine electronic properties.
Main Results:
- Both 2H and 1T phases of monolayer AsTe₂ were found to be dynamically stable.
- All investigated AsTe₂ structures (2D, 1D nanoribbons, 0D quantum dots) exhibit nonmagnetic metallic behavior.
- The metallic nature remains robust even under high biaxial strain, irrespective of dimensionality or crystallographic orientation.
Conclusions:
- Monolayer AsTe₂ possesses stable crystal structures and inherent metallic properties.
- The robust metallicity across various dimensions makes AsTe₂ a highly promising material for future nanodevice applications.
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