Giant Strain-Induced Spin Splitting Effect in MnTe, a g-Wave Altermagnetic Semiconductor.

Hexagonal MnTe is an altermagnetic semiconductor with g-wave symmetry of spin polarization in momentum space. In the nonrelativistic limit, this symmetry mandates that electric current flowing in any crystallographic direction is unpolarized. However, here I show that elastic strain is effective in inducing the spin splitting effect in MnTe.

Spin-orbit torque in a three-fold-symmetric bilayer and its effect on magnetization dynamics.

Field-free switching of perpendicular magnetization has previously been observed in an epitaxial L1-ordered CoPt/CuPt bilayer and attributed to spin-orbit torque (SOT) arising from the crystallographic 3point group of the interface. Using a first-principles nonequilibrium Green's function formalism combined with the Anderson disorder model, we calculate the angular dependence of the SOT in a CoPt/CuPt bilayer and find that the magnitude of the 3SOT is about 20% of the conventional dampinglike SOT. We further study the magnetization dynamics in perpendicularly magnetized films in the presence of 3SOT and Dzyaloshinskii-Moriya interaction, using the equations of motion for domain wall dynamics and micromagnetic simulations.

Pseudotunnel Magnetoresistance in Twisted van der Waals FeGeTe Homojunctions.

Twistronics, a novel engineering approach involving the alignment of van der Waals (vdW) integrated two-dimensional materials at specific angles, has recently attracted significant attention. Novel nontrivial phenomena have been demonstrated in twisted vdW junctions (the so-called magic angle), such as unconventional superconductivity, topological phases, and magnetism. However, there have been only few reports on integrated vdW layers with large twist angles θ, such as twisted interfacial Josephson junctions using high-temperature superconductors.

On the origin of magnetic anisotropy in 4-free ferromagnets based on the CaCustructure.

Using first-principles calculations, we investigate the origin of magnetocrystalline anisotropy in a series of 4-electron-free intermetallics with CaCu-based structures: YCo, YCoB, and YCoB. The electronic structure of these compounds is characterized by a set of narrow 3bands near the Fermi level. In YCothe easy-axis anisotropy originates primarily in the spin-orbit coupling-induced mixing of the electronic states with Codx2-y2anddxycharacter.