Abstract
Spectrum of spin waves (magnons) in the two-dimensional bilayer antiferromagnet based on the VSe 2 is studied theoretically. The vanadium atoms within individual layers are coupled ferromagnetically, while the exchange coupling between V atoms located in different planes is antiferromagnetic. The magnon dispersion relation and its dependence on magnetic anisotropy is analyzed in the regime of weak external magnetic field. The spin-wave spectra are derived within the spin-wave theory of antiferromagnets in terms of the Holstein–Primakoff transformation combined with the Bogolubov diagonalization scheme. The magnon dispersion features are discussed in case of the T-type stacking of the VSe2 bilayer.
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