Two-dimensional ferromagnetic semiconductors of monolayer BiXO₃ (X = Ru, Os) with direct band gaps, high Curie temperatures, and large magnetic anisotropy

Abstract

Two-dimensional (2D) ferromagnetic semiconductors are highly promising candidates for spintronics, but rarely reported with direct band gap, high Curie temperature (Tc), and large magnetic anisotropy. Using first-principles calculations, we predict...

Tunable valley polarization effect and second-order topological state in monolayer FeClSH

“…T C is a significant parameter for FM materials. 54,55 The T C of monolayer FeClSH was estimated from the Heisenberg model. The spin Heisenberg Hamiltonian can be expressed as: 56 where S i and S j are the spin vectors of each atom, and S i z is the spin component parallel to the z -axis (001).…”

Prediction of two-dimensional large-gap magnetic semiconductors in transition metal superhalogenides

“…13 Theoretically, a series of 2D magnetic semiconductors have been predicted. 15–20 Strong magnetic coupling and uniaxial magnetocrystalline anisotropy are both important for the formation of long-range magnetic order. 21–23 Therefore, in the design of 2D magnetic semiconductors, 3d transition metals are usually used to provide localized magnetic moments, while the heavy main group elements ( e.g.…”