Tunable magneto-optical effect, anomalous Hall effect, and anomalous Nernst effect in the two-dimensional room-temperature ferromagnet <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mn>1</mml:mn><mml:mi>T</mml:mi></mml:mrow><mml:mo>?</mml:mo><mml:msub><mml:mrow><mml:mi>CrTe</mml:mi></mml:mrow><mml:mn>2</mml:mn></mml:msub></mml:math>
نویسندگان
چکیده
Utilizing first-principles density functional theory calculations together with group analyses, we systematically investigate the spin-order-dependent magneto-optical effect (MOE), anomalous Hall (AHE), and Nernst (ANE) in recently discovered two-dimensional room-temperature ferromagnet $1T\text{\ensuremath{-}}{\mathrm{CrTe}}_{2}$. We find that spin prefers an in-plane direction by magnetocrystalline anisotropy energy calculations. The MOE, AHE, ANE display a period of $2\ensuremath{\pi}/3$ when rotates within atomic plane, they are forbidden if mirror plane perpendicular to exists. By reorienting from out-of-plane direction, enhanced around one order magnitude. Moreover, establish layer-dependent magnetic properties multilayer $1T\text{\ensuremath{-}}{\mathrm{CrTe}}_{2}$ predict antiferromagnetism ferromagnetism for bilayer trilayer $1T\text{\ensuremath{-}}{\mathrm{CrTe}}_{2}$, respectively. prohibited antiferromagnetic due existence space-time inversion symmetry, whereas all them activated ferromagnetic significantly compared those monolayer Our results show transports proprieties can be effectively modulated altering layer number.
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ژورنال
عنوان ژورنال: Physical review
سال: 2021
ISSN: ['0556-2813', '1538-4497', '1089-490X']
DOI: https://doi.org/10.1103/physrevb.103.024436