0000000000660727

AUTHOR

Ingrid Mertig

showing 3 related works from this author

Terahertz Spin‐to‐Charge Conversion by Interfacial Skew Scattering in Metallic Bilayers

2021

The efficient conversion of spin to charge transport and vice versa is of major relevance for the detection and generation of spin currents in spin‐based electronics. Interfaces of heterostructures are known to have a marked impact on this process. Here, terahertz (THz) emission spectroscopy is used to study ultrafast spin‐to‐charge‐current conversion (S2C) in about 50 prototypical F|N bilayers consisting of a ferromagnetic layer F (e.g., Ni81Fe19, Co, or Fe) and a nonmagnetic layer N with strong (Pt) or weak (Cu and Al) spin‐orbit coupling. Varying the structure of the F/N interface leads to a drastic change in the amplitude and even inversion of the polarity of the THz charge current. Rem…

spectroscopyMaterials sciencespin-to-charge conversion530 PhysicsTerahertz radiationterahertz emission spectroscopyterahertz emission02 engineering and technologyElectron010402 general chemistry5307. Clean energy01 natural sciencesGeneral Materials ScienceSpectroscopySpin-½Condensed matter physicsScatteringMechanical EngineeringCharge (physics)Heterojunction530 Physik021001 nanoscience & nanotechnology0104 chemical sciencesskew scatteringFerromagnetismMechanics of Materialsinterface; skew scattering; spin-to-charge conversion; terahertz emission spectroscopyinterface0210 nano-technologyAdvanced Materials
researchProduct

Broadband Terahertz Probes of Anisotropic Magnetoresistance Disentangle Extrinsic and Intrinsic Contributions

2021

Anisotropic magnetoresistance (AMR) is a ubiquitous and versatile probe of magnetic order in contemporary spintronics research. Its origins are usually ascribed to extrinsic effects (i.e. spin-dependent electron scattering), whereas intrinsic (i.e. scattering-independent) contributions are neglected. Here, we measure AMR of polycrystalline thin films of the standard ferromagnets Co, Ni, Ni81Fe19 and Ni50Fe50 over the frequency range from DC to 28 THz. The large bandwidth covers the regimes of both diffusive and ballistic intraband electron transport and, thus, allows us to separate extrinsic and intrinsic AMR components. Analysis of the THz response based on Boltzmann transport theory revea…

Materials scienceMagnetoresistanceTerahertz radiation530 PhysicsQC1-999General Physics and AstronomyFOS: Physical sciences01 natural sciences530010305 fluids & plasmasTerahertz time-domain spectroscopy0103 physical sciencesMesoscale and Nanoscale Physics (cond-mat.mes-hall)ddc:530Thin film010306 general physicsTerahertz time-domain spectroscopySpintronicsCondensed matter physicsCondensed Matter - Mesoscale and Nanoscale Physicsbusiness.industryPhysics500 Naturwissenschaften und Mathematik::530 Physik::530 PhysikAnisotropic magnetoresistanceSpintronics530 PhysikFerromagnetismPhotonicsbusinessElectron scattering
researchProduct

Spin caloric transport from density-functional theory

2019

Spin caloric transport refers to the coupling of heat with spin transport. Its applications primarily concern the generation of spin currents and control of magnetisation by temperature gradients for information technology, known by the synonym spin caloritronics. Within the framework of ab initio theory, new tools are being developed to provide an additional understanding of these phenomena in realistic materials, accounting for the complexity of the electronic structure without adjustable parameters. Here, we review this progress, summarising the principles of the density-functional-based approaches in the field and presenting a number of application highlights. Our discussion includes th…

spintronicsMaterials scienceAcoustics and UltrasonicsSpintronicsCondensed matter physicsthermal spin torqueCaloric theory02 engineering and technologyPhysik (inkl. Astronomie)021001 nanoscience & nanotechnologyCondensed Matter Physics01 natural sciencesspin Nernst effectSurfaces Coatings and FilmsElectronic Optical and Magnetic Materialsspin Seebeck effectdensity functional calculations0103 physical sciencesspin caloritronicsDensity functional theoryCondensed Matter::Strongly Correlated Electronsmagneto-Seebeck effect010306 general physics0210 nano-technologySpin-½
researchProduct