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- W2937197872 abstract "The ${mathrm{CoBr}}_{2}$ monolayer is predicted to be an intrinsically ferromagnetic (FM) semiconductor based on the first-principles calculations. The results of the magnetic anisotropy energy show that the ${mathrm{CoBr}}_{2}$ monolayer has an easy magnetization plane and belongs to the family of two-dimensional $XY$ magnets. The exchange interactions and thus the magnetic properties can be effectively tuned by external strain and carrier doping. The biaxial tensile strain can induce FM-antiferromagnetic (AFM) phase transition in the ${mathrm{CoBr}}_{2}$ monolayer, by which the Co-Br-Co bond angle is enlarged deviating far away from ${90}^{ensuremath{circ}}$. While the compressive strain stabilizes the FM state by reducing the nearest Co-Co distance and enhancing the $ptext{ensuremath{-}}d$ hybridization between Co and Br atoms. The ${mathrm{CoBr}}_{2}$ monolayer remains semiconducting for the whole range of strain investigated. For the carrier doping, however, the ${mathrm{CoBr}}_{2}$ monolayer tends to be a half-metal for both hole and electron doping. Doping not only introduces itinerant carriers, but also enhances the $ptext{ensuremath{-}}d$ hybridization between the Co and Br atoms, both of which enhance the FM coupling significantly. The tunability of the electronic and magnetic properties of ${mathrm{CoBr}}_{2}$ monolayer makes it a promising candidate for future nanospintronic applications." @default.
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- W2937197872 date "2019-04-11" @default.
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- W2937197872 title "Strain- and carrier-tunable magnetic properties of a two-dimensional intrinsically ferromagnetic semiconductor: <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:msub><mml:mi>CoBr</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:math> monolayer" @default.
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- W2937197872 doi "https://doi.org/10.1103/physrevb.99.134416" @default.
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