We have studied the intrinsic spin Hall conductivity of 3d transition metal ferromagnets using first-principles calculations. find bcc Fe and fcc Ni, prototypes ferromagnetic systems, depends on direction magnetization. The electrons with their orientation orthogonal to magnetization are found be larger than that when two parallel. For example, former can more four times latter in Fe. Such a difference arises due anisotropy current operator spinor space: Its expectation value Bloch states...

We fabricated (001)-oriented C1b-NiMnSb epitaxial films on MgO substrate by a magnetron sputtering system and systematically investigated the structure, magnetic property, anisotropic magnetoresistance (AMR) effect. NiMnSb film was deposited using stoichiometric target which has Mn-deficient (Mn ∼ 28.7 at. %) off-stoichiometric composition ratio. have bulk spin-polarization in measuring AMR basis of recent study for half-metallic L21-Heusler compounds. Although negative sign ratio, is...

Electrical manipulation of magnetization by spin-orbit torque (SOT) has shown promise for realizing reliable magnetic memories and oscillators. To date, the generation transverse spin current SOT, whether it is Hall effect (SHE), Rashba-Edelstein or spin-momentum locking origin, relies primarily on materials heterostructures containing 5$d$ 6$p$ heavy elements with strong coupling. Here we show that a paramagnetic CoGa compound possesses large enough angle to allow robust SOT switching...

The spin Hall effect of a Dirac Hamiltonian system is studied using semiclassical analyses and the Kubo formula. In this system, conductivity dependent on definition current. All components vanish when current defined as flow angular momentum. contrast, off-diagonal are nonzero scale with carrier velocity (and effective $g$ factor) consists magnetic moment. We derive analytical formula conductivity, mobility, to compare experiments. experiments, we use Bi model that can be characterized by...

The intrinsic spin Hall conductivity and the anomalous of ferromagnetic L10-CoPt are studied using first principles calculations. We identify symmetry Berry curvature to reveal correlation between conductivities. Whereas preserves C4v crystal rotation along c-axis, in accordance with symmetry, is reduced C2v. Such reduction most notable at band crossing points where Bloch states have opposite characters. show that originates from difference matrix elements velocity current operators such...

We have fabricated fully epitaxial current-perpendicular-to-plane giant magnetoresistance (CPP-GMR) devices using C1b-half Heusler compound NiMnSb, the first candidate of half-metallic material, as electrode with a Ag spacer. The device shows ratios 25% at 4.2 K and 9.6% 290 K, which are one highest values for CPP-GMR half-Heusler compounds. However, these much lower compared to those reported L21-full Careful analysis microstructure scanning transmission electron microscopy energy...

We investigate the intrinsic orbital Hall conductivity (OHC) and spin (SHC) in a bismuth semimetal, by employing an sp-orbital tight-binding model. report notable difference between anisotropy of OHC SHC whose polarizations lie within basal plane. do not observe substantial correlation Berry curvatures with spin-orbit coupling (SOC) at Fermi energy, disproving strong SOC regime. argue huge Bi semimetal is attributed to its gigantic which strongly affects hybridization p orbitals, despite...

We study the inverse Faraday effect (IFE) in a Dirac Hamiltonian with random impurities using Keldysh formalism and diagrammatic perturbation theory. The mass term is essential for IFE, where spin magnetic moment induced by circularly polarized light proportional to frequency of incident within THz regime. For massive electrons, corrections due short-range on vertex exhibits mixing angular momentum vertex. density response divergently enhanced near band edge, indicting long-range diffusion...

Nanoscale topological spin textures in magnetic systems are emerging as promising candidates for scalable quantum architectures. Despite their potential qubits, previous studies have been limited to semiclassical approaches, leaving a critical gap: the lack of fully demonstration. Here, we address this challenge by employing density-matrix renormalization group (DMRG) method establish domain wall (DW) qubits coupled spin-1/2 chains. We calculate ground-state energies and excitation gaps...

The intrinsic spin Hall conductivity and the anomalous of ferromagnetic L1$_0$-CoPt are studied using first principle calculations Berry curvatures, respectively. We find that curvature exhibit different symmetry with respect to band structure. preserves $C_{4v}$ crystal rotation along c-axis whereas reduces $C_{2v}$. Contributions classified by character bands crossing Fermi level. reduced is due points opposite characters. From model Hamiltonian analyses, we show universality this distinct...

We study the intrinsic spin Hall effect of a Dirac Hamiltonian system with ferromagnetic exchange coupling, minimal model combining relativistic spin-orbit interaction and ferromagnetism. The energy bands are split after introducing Stoner-type ordering which breaks spherical symmetry pristine model. totally antisymmetric conductivity (SHC) tensor becomes axially anisotropic along direction external electric field. Interestingly, anisotropy does not vanish in asymptotic limit zero...

We study the intrinsic spin Hall effect of a Dirac Hamiltonian system with ferromagnetic exchange coupling, minimal model combining relativistic spin-orbit interaction and ferromagnetism. The energy bands are split after introducing Stoner-type ordering which breaks spherical symmetry pristine model. totally antisymmetric conductivity (SHC) tensor becomes axially anisotropic along direction external electric field. Interestingly, anisotropy does not vanish in asymptotic limit zero...

We investigate the intrinsic orbital Hall conductivity (OHC) and spin (SHC) in Bismuth semimetal, by employing sp-orbital tight-binding model. report a substantial difference between anisotropy of OHC SHC whose polarization lie within basal plane. do not observe correlation Berry curvature via orbit coupling (SOC) at Fermi energy, disproving strong SOC regime. argue huge Bi semimetal attributes to its gigantic which strongly affects hybridization p-orbitals, despite relatively small...

We study the inverse Faraday effect (IFE) in a Dirac Hamiltonian with random impurities using Keldysh formalism and diagrammatic perturbation theory. The mass term is essential for IFE, where spin magnetic moment induced by circularly polarized light proportional to frequency of incident within THz regime. For massive electrons, corrections due short-range on vertex exhibits mixing angular momentum vertex. density response divergently enhanced near band edge, indicting long-range diffusion...

We investigate the intrinsic orbital Hall conductivity (OHC) and spin (SHC) in a bismuth semimetal, by employing an sp-orbital tight-binding model. report notable difference between anisotropy of OHC SHC whose polarizations lie within basal plane. do not observe substantial correlation Berry curvatures with spin-orbit coupling (SOC) at Fermi energy, disproving strong SOC regime. argue huge Bi semimetal is attributed to its gigantic which strongly affects hybridization p orbitals, despite...