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Tunable electronic structures and half-metallicity in two-dimensional InSe functionalized with magnetic superatom
Wei Kang1, Xiaoqing Liu1, Wen Zeng1
1Key Laboratory of Optoelectronic Technology and System of Ministry of Education, College of Optoelectronic Engineering, Chongqing University, Chongqing 400044, People's Republic of China.
This study explores magnetic superatoms (MnCl3) on 2D Indium Selenide (InSe) for spintronics. Functionalized InSe can become a half-metal, enabling 100% spin polarization with electric fields.
Area of Science:
- Materials Science
- Condensed Matter Physics
- Nanotechnology
Background:
- Two-dimensional (2D) materials offer unique electronic properties.
- Indium Selenide (InSe) is a nonmagnetic semiconductor with potential for functionalization.
- Magnetic superatoms provide a route to introduce magnetism into nonmagnetic materials.
Purpose of the Study:
- Investigate the properties of 2D InSe functionalized with magnetic MnCl3 superatoms.
- Explore the potential for creating magnetic semiconductors and half-metals.
- Examine the effects of electric fields on the functionalized system for spintronics applications.
Main Methods:
- First-principles calculations were employed to study geometric, energetic, and electronic properties.
- Analysis of spin-polarized electronic band structures.
- Simulation of electric field effects on charge transfer and spin polarization.
Main Results:
- 2D InSe non-covalently interacts with MnCl3, serving as a substrate for superatom assembly.
- Low MnCl3 coverage results in a magnetic semiconductor with spin-polarized states in the band gap.
- Higher coverage leads to a half-metallic state with one spin channel at the Fermi level.
- Electric fields induce charge transfer, enabling 100% spin polarization at lower MnCl3 coverage.
Conclusions:
- Functionalized InSe with magnetic superatoms is a promising platform for 2D spintronics.
- Controllable half-metallicity and high spin polarization can be achieved.
- Combining superatom assembly with electric gating offers versatile spintronic device possibilities.
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