11 papers
Controlling Terahertz Spintronic Photocurrents in 2D-Semiconductor|Ferromagnet Heterostructures through a Functional Hybrid Interface
A. Alostaz, R. Rouzegar, Eddie Harris-Lee +9
A profound understanding of terahertz (THz) spin and charge currents in heterostructures involving ferromagnets (FMs) and two-dimensional (2D) materials promises emerging applicati…
Terahertz magneto-photocurrents in the topological insulator BiSe probe its topological surface states
Chihun In, Genaro Bierhance, Deepti Jain +5
We study ultrafast magneto-photocurrents in a three-dimensional topological insulator. For this purpose, we excite (InBi)Se thin films with a femtosecond laser…
Terahertz switching of antiferromagnetic order by Néel spin-orbit torques
Yannic Behovits, Alexander L. Chekhov, Amon Ruge +13
Ultrafast electric manipulation of magnetic order in solids is critical for the development of future terahertz data processing. A fascinating concept for such high-speed operation…
Influence of atomic-scale defects on coherent phonon excitations by THz near fields in an STM
Vibhuti N. Rai, Junyoung Sim, Florian Faaber +7
Coherent phonons describe the collective, ultrafast motion of atoms and play a central role in light-induced structural dynamics. Here, we employ terahertz scanning tunneling micro…
Ultrafast electron heating as the dominant driving force of photoinduced terahertz spin currents
Reza Rouzegar, Pilar Jimenez-Cavero, Oliver Gueckstock +9
Ultrafast spintronics strongly relies on the generation, transport, manipulation and detection of terahertz spin currents (TSCs). In F|HM stacks consisting of a ferromagnetic layer…
Femtosecond photocurrents by the Dresselhaus bulk spin-galvanic effect in an inversion-asymmetric ferromagnet
Junwei Tong, Zdenek Kaspar, Afnan Alostaz +18
We study ultrafast photocurrents in thin films of a model ferromagnetic metal with broken bulk inversion symmetry, the half-metallic Heusler compound NiMnSb, following excitation w…