Zeeman Effect in Centrosymmetric Antiferromagnetic Semiconductors Controlled by an Electric Field

Uncovering hidden spin polarization of energy bands in antiferromagnets

“…Therefore, the hidden effect of two-fold degenerate energy states subspace (when 𝐸 𝑧 = 0) can be traced back to the individual FeBr2 layers. We note the hidden spin polarization effect from local "spin-split" sectors has also been recently exemplified and revealed via an electric field in some antiferromagnets 31,48 where external electric field lifts the spin degeneracy. These examples not only verify our understanding of the hidden effect being intrinsic to the bulk but also suggest an external electric field as an effective knob for modulating the hidden effect.…”

Spin-splitting and switchable half-metallicity in a van der Waals multiferroic CuBiP2Se6/GdClBr heterojunction

“…The spin splitting gap is higher than that of the reported work under an electric field, two centrosymmetric antiferromagnets Fe 2 TeO 6 and SrFe 2 S 2 O, can generate Zeeman spin splitting of 55 meV and 30 meV at the gamma point. 28 This result has potential value in the applications of spintronic devices. In Fig.…”

“…GdClBr provides a magnetic field along the z-axis for CuBiP 2 Se 6 , resulting in spin splitting at the gamma point. 18,22,28 In model4, the band structure of CuBiP 2 Se 6 is a semiconductor, and the value of spin splitting at the gamma point is 121 meV. The spin splitting gap is higher than that of the reported work under an electric field, two centrosymmetric antiferromagnets Fe 2 TeO 6 and SrFe 2 S 2 O, can generate Zeeman spin splitting of 55 meV and 30 meV at the gamma point.…”

“…[25][26][27] Zhao et al predicted that under an electric field, two centrosymmetric antiferromagnets, Fe 2 TeO 6 and SrFe 2 S 2 O, can generate Zeeman splitting of 55 meV and 30 meV at the gamma point. 28 This Zeeman splitting is due to the electric field inducing a magnetic moment inside the antiferromagnet, which means that the antiferromagnet is magnetized. Therefore, by the magnetoelectric coupling effect, Zeeman splitting is induced in the antiferromagnet under the electric field.…”

Tunable sliding ferroelectricity and magnetoelectric coupling in two-dimensional multiferroic MnSe materials

“…A linear magnetoelectric coupling has been demonstrated experimentally in an A-type interlayer AFM CrI 3 bilayer 41 . Via symmetry analysis, 21 centrosymmetric magnetic point groups (MPGs) were identified to accommodate electrically controllable Zeeman spin splitting where the electric field acts as an internal effective magnetic field 42 . Notably, the MPG of the MnSe monolayer with an isotropic in-plane Neel-type AFM configuration (2′/m) is one of the 21 MPGs, implying the feasibility of electrically controllable Zeeman spin splitting.…”