Anisotropic half-metallicity in zigzag edge SiP₃ nanoribbons

Area of Science:

• Condensed Matter Physics
• Materials Science
• Quantum Chemistry

Background:

• Two-dimensional (2D) materials offer unique electronic properties.
• Silicon-phosphide (SiP3) is a promising 2D material system.
• Nanostructure engineering is crucial for tailoring material properties.

Purpose of the Study:

• Investigate magnetic and spin-transport properties of zigzag-edge SiP3 nanoribbons.
• Explore the influence of edge termination and width on electronic behavior.
• Assess the potential for spintronic applications.

Main Methods:

• First-principle calculations were employed.
• Analysis of magnetic ordering and spin-dependent electronic structure.
• Simulation of external electric field effects on transport properties.

Main Results:

• SiP3 nanoribbons exhibit indirect band-gap semiconducting behavior.
• Band gap decreases with increasing ribbon width.
• Half-metallicity observed in P-terminated ribbons under electric bias.
• Odd Si-atom nanoribbons show bias-dependent anisotropic half-metallicity.

Conclusions:

• Zigzag-edge SiP3 nanoribbons possess tunable electronic and magnetic properties.
• Edge termination and external bias are key control parameters.
• Anisotropic half-metallicity suggests suitability for spintronic and switching devices.