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Robust half-metallic properties in two-dimensional CuCr2Se2X2(X = Cl, Br, I)
Haimei Zhou1, Yujing Guo1, Shuai Liu1
1State Key Laboratory of Metastable Materials Science and Technology & Hebei Key Laboratory of Microstructural Material Physics, School of Science, School of Science, Yanshan University, Qinhuangdao 066004, People's Republic of China.
Two-dimensional magnetic materials like CuCr2Se2X2 show robust ferromagnetism and half-metallicity. These materials offer high Curie temperatures, making them promising for advanced spintronic devices.
Area of Science:
- Materials Science
- Condensed Matter Physics
- Solid State Chemistry
Background:
- Two-dimensional (2D) magnetic materials are crucial for spintronics.
- These materials integrate magnetic and electronic properties at the atomic level.
Purpose of the Study:
- Investigate monolayer CuCr2Se2X2 (X = Cl, Br, I) for spintronic applications.
- Explore their magnetic and electronic characteristics.
Main Methods:
- Density Functional Theory (DFT) calculations.
- Analysis of electronic band structure and magnetic coupling.
Main Results:
- Monolayer CuCr2Se2X2 exhibits robust ferromagnetic (FM) behavior.
- Achieved 100% spin polarization, indicating half-metallicity.
- High Curie temperatures (TC) above room temperature, with the Br variant reaching 586 K.
- FM coupling is mediated by superexchange interactions from Cr d-orbitals.
Conclusions:
- CuCr2Se2X2 materials are promising for high-performance spintronic devices.
- Strain engineering can modulate exchange interactions.
- These 2D materials offer a versatile platform for next-generation electronics.
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