Weyl semimetals are playing a major role in condensed-matter physics due to exotic topological properties, and their coexistence with ferromagnetism may lead enhanced spin-related phenomena. Here, the inverse spin Hall effect (ISHE) ferromagnetic semimetal Heusler alloy ${\mathrm{Co}}_{2}\mathrm{MnGa}$ was investigated at room temperature by means of electrical injection lateral valve structures. Spin transport properties such as polarization diffusion length this material were precisely...

The Longwave Infrared Camera (LIR) is one of a suite cameras onboard the Venus orbiter Akatsuki. It will take images thermal radiation in wavelength range 8–12 µm emitted by cloud tops. use an uncooled micro-bolometer array as infrared image sensor makes LIR lightweight, small and low-power consumption instrument with required noise equivalent temperature difference 0.3 K. Temperature horizontal wind fields at cloud-top be retrieved for both dayside nightside equal quality. This provide key...

In this paper, we report on the investigation of (i) transport properties multicarriers in semimetal Bi and (ii) spin conversion physics system a ferrimagnetic insulator, yttrium-iron-garnet. Hall measurements reveal that electrons holes coexist Bi, with being dominant carrier. The results experiment corroborate measurement; addition, inverse effect governs semimetal/insulator system. This study provides further insights into systems.

The physics related to Berry curvature is now a central research topic in condensed matter physics. dipole (BCD) significant and intriguing phenomenon that involves inversion symmetry breaking. However, the creation controllability of BCDs have so far been limited below room temperature (RT), nonvolatile (i.e., ferroic) not yet discovered, hindering further progress topological In this work, we demonstrate switchable BCD effect at RT crystalline insulator, Pb1–xSnxTe (PST), which attributed...

Controlling/storing information carriers, such as electron charge and spin, is key for modern society, significant efforts have been paid made to establish novel technologies at the nanoscale. The rise of Si-based semiconductor technology magnetism-based has motivated by aforementioned demands. However, both individually developed, with little effort in fusing them. Hence, establishing a bridge that would allow realization device strongly awaited. In line this research strategy, creation...

The inverse Rashba-Edelstein effect (IREE) is a spin conversion mechanism that recently attracts attention in spintronics and condensed matter physics. In this letter, we report an investigation of the IREE Bi/Ag by using ferrimagnetic insulator yttrium iron garnet (YIG). We prepared two types samples with opposite directions Rashba field changing stacking order Bi Ag. An electric current generated was observed from both stacks, efficiency -characterized length- estimated taking into account...

Broadband ferromagnetic resonance (bbFMR) spectroscopy is an established experimental tool to quantify magnetic properties. Due frequency-dependent transmission of the microwave setup, bbFMR measurements in frequency domain require a suitable background removal method. Here, we present measurement and data analysis protocol that allows us perform quantitative frequency-swept without need for calibration setup. We furthermore compare results proposed space conventional field-space obtained...

Abstract The temperature evolution of a direct-current electromotive force (EMF) generated by spin pumping and the inverse-spin Hall effect in platinum (Pt)/yttrium iron garnet (YIG) bilayer was investigated down to 80 K. magnitude EMF decreased significantly with decreasing disappeared at approximately 40-nm-thick YIG films fabricated metal organic decomposition method exhibited single-peak ferrimagnetic resonance (FMR) spectra without any wave resonance, which allowed us precisely analyze...

Abstract The broken inversion symmetry and time-reversal along with the large spin–orbit interactions in monolayer MoS 2 make it an ideal candidate for novel valleytronic applications. However, realization of efficient spin-valley-controlled devices demands integration perpendicular magnetic anisotropy (PMA) electrodes negligible Schottky barriers. Here, as first demonstration, we fabricated a field-effect transistor PMA electrodes: Pt/[Co/Pt] 3 [Co/Pt] . I – V curves PMA/MoS contacts show...

Topological quantum materials (TQMs) possess abundant and attractive spin physics, a Weyl semimetal is the representative material because of generation polarization that available for devices due to fictitious monopoles at edge node. Meanwhile, allows other but unexplored local symmetry breaking. Here, we report all-electric device operation using type-II semimetal, WTe$_2$, room temperature. The spins propagating in perpendicular WTe$_2$ plane, which ascribed in-plane breaking yielding...

Self-induced spin-orbit torques (SI-SOTs) in ferromagnetic (FM) layers have been overlooked when estimating the spin Hall angle (SHA) of adjacent nonmagnetic (NM) layers. In this work, we observe anomalous sign inversion total SOT spin-torque resonance due to enhanced SI-SOT, and successfully rationalize through a theoretical calculation considering SHE both NM FM The findings show that using an layer whose SHA is same as achieves efficient SOT-magnetization switching with assistance SI-SOT....

Spin-orbit torque (SOT) is receiving tremendous attention from both fundamental and application-oriented aspects. Co2MnGa, a Weyl ferromagnet that in class of topological quantum materials, possesses cubic-based high structural symmetry, the L21 crystal ordering, which should be incapable hosting anisotropic SOT conventional understanding. Here we show discovery gigantic anisotropy self-induced Co2MnGa. The magnitude comparable to heavy metal/ferromagnet bilayer systems, despite inversion...

Conversion of pure spin current to charge in single-layer graphene (SLG) is investigated by using pumping. Large-area SLG grown chemical vapor deposition used for the conversion. Efficient accumulation pumping enables observing an electromotive force produced inverse Hall effect (ISHE) SLG. The angle estimated be 6.1*10-7. observed ISHE ascribed its non-negligible spin-orbit interaction

While the effective g-factor can be anisotropic due to spin-orbit interaction (SOI), its existence in solids cannot simply asserted from a band structure, which hinders progress on studies such viewpoints. The bismuth (Bi) is largely anisotropic; especially for holes at T-point, perpendicular trigonal axis negligibly small (<0.112), whereas along very large (62.7). We clarified this work that anisotropy of gives rise spin conversion Bi experimental and theoretical approaches. Spin-torque...

Spin accumulation voltages in a non-degenerate Si spin valve are discussed quantitatively as function of electric bias current using systematic experiments and model calculations. As an open question semiconductor spintronics, the origin deviation measured experimentally is clarified from that obtained by calculation drift diffusion equation including effect spin-dependent interfacial resistance tunneling barriers. Unlike case metallic valves, dependence resistance-area product for...

The topological nature of Heusler-alloy-based Weyl ferromagnet, Co${}_{2}$MnGa, results in an abundance intriguing physical phenomena. In this work, a colossal enhancement unidirectional magnetoresistance induced by the large anomalous Nernst effect is realized nano-sized wires, which enables operation prototypical non-volatile all-electric two-terminal memory device at room temperature. A size scaling investigation indicates that there further for improving ratio. These findings can pave...

We studied the spin injection in a NiFe(Py)/Si system using broadband ferromagnetic resonance spectroscopy. The Gilbert damping parameter of Py layer on top Si channel was determined as function doping concentration and thickness. For fixed thickness, we observed an increase with decreasing resistivity channel. concentration, measured increasing for No found Py/Si samples insulating interlayer. attribute our observations to enhanced into low-resistivity by pumping.

We demonstrate an enhancement of the spin-orbit coupling in silicon (Si) thin films by doping with bismuth (Bi), a heavy metal, using ion implantation. Quantum corrections to conductance at low temperature phosphorous-doped Si before and after Bi implantation is measured probe increase coupling, clear modification magnetoconductance signals observed: changes from weak localization crossover between antilocalization. The elastic diffusion length, phase coherence length without are estimated,...

We investigated current-induced torques in a single permalloy layer connected to nonmagnetic electrodes with lateral inversion asymmetry by spin-torque ferromagnetic resonance. Considering the symmetry of resonance spectrum respect magnetic field direction, we successfully separated various types torque. In addition in-plane damping-like and field-like torques, detected two additional components out-of-plane (OOP) symmetries which direction correspond an OOP torque obtained particular...

A spin-splitting state due to a Rashba-type spin–orbit interaction is investigated using two-dimensional electron gas (2DEG) at the surface of SrTiO3. The circular photogalvanic effect utilized detect state. Both polarization and incident light angle dependence measured photocurrent generated in 2DEG unequivocally show presence spin splitting 2DEG, variation carrier densities provides further supporting evidence. This finding could pave way for investigating textures physics systems.