947 citations · 4.5k across the 50 of their papers we have counts for
19 papers · 1 filter
Accessing ultrafast spin-transport dynamics in copper using broadband terahertz spectroscopy
Jiří Jechumtál, Reza Rouzegar, Oliver Gueckstock +10
We study the spatiotemporal dynamics of ultrafast electron spin transport across nanometer-thick copper layers using broadband terahertz spectroscopy. Our analysis of temporal dela…
Nonlinear terahertz Néel spin-orbit torques in antiferromagnetic MnAu
Yannic Behovits, Alexander L. Chekhov, Stanislav Yu. Bodnar +8
Antiferromagnets have large potential for ultrafast coherent switching of magnetic order with minimum heat dissipation. In novel materials such as MnAu and CuMnAs, electric rat…
Manipulating THz Spin Current Dynamics by the Dzyaloshinskii-Moriya Interaction in Antiferromagnetic Hematite
Hongsong Qiu, Tom Sebastian Seifert, Lin Huang +12
An important vision of modern magnetic research is to use antiferromagnets as controllable and active ultrafast components in spintronic devices. Hematite is a promising model mate…
Terahertz spin-to-charge current conversion in stacks of ferromagnets and the transition-metal dichalcogenide NbSe
Lukáš Nádvorník, Oliver Gueckstock, Lukas Braun +16
Transition-metal dichalcogenides (TMDCs) are an aspiring class of materials with unique electronic and optical properties and potential applications in spin-based electronics. Here…
Emission of coherent THz magnons in an antiferromagnetic insulator triggered by ultrafast spin-phonon interactions
E. Rongione, O. Gueckstock, M. Mattern +17
Antiferromagnetic materials have been proposed as new types of narrowband THz spintronic devices owing to their ultrafast spin dynamics. Manipulating coherently their spin dynamics…
Circular photogalvanic effects in topological insulator/ferromagnet hybrid structures
T. Schumann, T. Kleinke, L. Braun +12
We study laser driven spin-current effects at ferromagnet/topological-insulator interfaces by two complementary experimental approaches. The DC photocurrent is studied in ferromagn…
Spin-voltage-driven efficient terahertz spin currents from the magnetic Weyl semimetals CoMnGa and CoMnAl
Genaro Bierhance, Anastasios Markou, Oliver Gueckstock +7
Magnetic Weyl semimetals are an emerging material class that combines magnetic order and a topologically non-trivial band structure. Here, we study ultrafast optically driven spin…
Transition of laser-induced terahertz spin currents from torque- to conduction-electron-mediated transport
Pilar Jiménez-Cavero, Oliver Gueckstock, Lukáš Nádvorník +16
Spin transport is crucial for future spintronic devices operating at bandwidths up to the terahertz (THz) range. In F|N thin-film stacks made of a ferro/ferrimagnetic layer F and a…
Impact of gigahertz and terahertz transport regimes on spin propagation and conversion in the antiferromagnet IrMn
Oliver Gueckstock, Rafael L. Seeger, Tom S. Seifert +7
Control over spin transport in antiferromagnetic systems is essential for future spintronic applications with operational speeds extending to ultrafast time scales. Here, we study…
Atomic scale control of spin current transmission at interfaces
Mohamed Amine Wahada, Ersoy Sasioglu, Wolfgang Hoppe +7
Spin transmission at ferromagnet/heavy metal interfaces is of vital importance for many spintronic devices. Usually the spin current transmission is limited by the spin mixing cond…
Theory of spin-Hall magnetoresistance in the AC (terahertz) regime
David A. Reiss, Tobias Kampfrath, Piet W. Brouwer
In bilayers consisting of a normal metal (N) with spin-orbit coupling and a ferromagnet (F), the combination of the spin-Hall effect, the spin-transfer torque, and the inverse spin…
Laser-induced terahertz spin transport in magnetic nanostructures arises from the same force as ultrafast demagnetization
R. Rouzegar, L. Brandt, L. Nadvornik +9
Laser-induced terahertz spin transport (TST) and ultrafast demagnetization (UDM) are central but so far disconnected phenomena in femtomagnetism and terahertz spintronics. Here, we…
High-throughput techniques for measuring the spin Hall effect
Markus Meinert, Björn Gliniors, Oliver Gueckstock +6
The spin Hall effect in heavy-metal thin films is routinely employed to convert charge currents into transverse spin currents and can be used to exert torque on adjacent ferromagne…
Broadband terahertz probes of anisotropic magnetoresistance disentangle extrinsic and intrinsic contributions
Lukáš Nadvorník, Martin Borchert, Liane Brandt +10
Anisotropic magnetoresistance (AMR) is a ubiquitous and versatile probe of magnetic order in contemporary spintronics research. Its origins are usually ascribed to extrinsic effect…
Ultrafast photocurrents in MoSe probed by terahertz spectroscopy
Denis Yagodkin, Lukas Nadvornik, Oliver Gueckstock +3
We use the terahertz (THz) emission spectroscopy to study femtosecond photocurrent dynamics in the prototypical 2D semiconductor, transition metal dichalcogenide MoSe. We ident…
Observation of spin Nernst photocurrents in topological insulators
T. Schumann, N. Meyer, G. Mussler +7
The theoretical prediction of topological insulators in 2007 triggered tremendous interest. They are of fundamental interest because of their topological twist in k-space, which co…
Femtosecond formation dynamics of the spin Seebeck effect revealed by terahertz spectroscopy
T. S. Seifert, S. Jaiswal, J. Barker +18
Understanding the transfer of spin angular momentum is essential in modern magnetism research. A model case is the generation of magnons in magnetic insulators by heating an adjace…
Coherent ultrafast spin-dynamics probed in three dimensional topological insulators
F. Boschini, M. Mansurova, G. Mussler +12
Topological insulators are candidates to open up a novel route in spin based electronics. Different to traditional ferromagnetic materials, where the carrier spin-polarization and…
Engineering ultrafast spin currents and terahertz transients by magnetic heterostructures
T. Kampfrath, M. Battiato, P. Maldonado +9
In spin-based electronics, information is encoded by the spin state of electron bunches. Processing this information requires the controlled transport of spin angular momentum thro…