Bilayer

Quantum mechanics

Algorithm

Antiferromagnetism

Metallurgy

Materials science

Ferromagnetism

Multiferroics

Coupling (piping)

Biochemistry

Computer science

Ferroelectricity

Magnetism

Physics

Membrane

Magnetic moment

Dielectric

Condensed matter physics

Chemistry

Physical Review Letters

Based on the first-principles prediction, we report the magnetoelectric coupling effect in two-dimensional multiferroic bilayer ${\mathrm{VS}}_{2}$. The ground-state $3R$-type stacking breaks space inversion symmetry, therefore introducing a spontaneous polarization perpendicular to the layer plane. We further reveal that the out-of-plane ferroelectric polarization of bilayer ${\mathrm{VS}}_{2}$ can be reversed upon interlayer sliding of an in-plane translation. Each ${\mathrm{VS}}_{2}$ layer has a ferromagnetic state with an opposite magnetic moment between two antiferromagnetically ordered layers. We found that ferroelectricity and antiferromagnetism can be coupled together by a ferrovalley in bilayer ${\mathrm{VS}}_{2}$ to realize electronic control of magnetism. Remarkably, a net magnetic moment is generated by reducing the interlayer distance, and an electric field is able to achieve linear and second-order nonlinear magnetoelectric coupling in bilayer ${\mathrm{VS}}_{2}$.

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Magnetoelectric Coupling in Multiferroic Bilayer VS2