Publications (31)
Quantum spin Hall effect and topological phase transitions in honeycomb antiferromagnets
C. Niu, J. -P. Hanke, P. M. Buhl +4
While the quantum spin Hall (QSH) effect and antiferromagnetic order constitute two of the most promising phenomena for embedding basic spintronic concepts into future technologies…
Efficient metallic spintronic emitters of ultrabroadband terahertz radiation
T. Seifert, S. Jaiswal, U. Martens +18
Terahertz electromagnetic radiation is extremely useful for numerous applications such as imaging and spectroscopy. Therefore, it is highly desirable to have an efficient table-top…
Doping-Induced Electronic and Structural Phase Transition in the Bulk Weyl Semimetal Mo1-xWxTe2
O. Fedchenko, F. K. Diekmann, P. Russmann +21
A comprehensive study of the electronic and structural phase transition from 1T` to Td in the bulk Weyl semimetal Mo1-xWxTe2 at different doping concentrations has been carried out…
Spin and Orbital Magnetism by Light in Rutile Altermagnets
T. Adamantopoulos, M. Merte, F. Freimuth +8
While the understanding of altermagnetism is still at a very early stage, it is expected to play a role in various fields of condensed matter research, for example spintronics, cal…
Spin-orbit strength driven crossover between intrinsic and extrinsic mechanisms of the anomalous Hall effect in epitaxial L1o FePd and FePt
K. M. Seemann, Y. Mokrousov, A. Aziz +8
We determine the composition of intrinsic as well as extrinsic contributions to the anomalous Hall effect (AHE) in the isoelectronic L1o FePd and FePt alloys. We show that the AHE…
Observation of Orbital Hall Effect in Si
R. Matsumoto, R. Ohshima, M. Funato +4
Controlling/storing information carriers, such as electron charge and spin, is key for modern information society, and significant efforts have been paid made to establish novel te…
Modification of Dzyaloshinskii-Moriya interaction stabilized domain wall chirality by driving currents
G. V. Karnad, F. Freimuth, E. Martinez +7
We measure and analyze the chirality of the Dzyaloshinskii-Moriya interaction (DMI) stabilized spin textures in multilayers of Ta/CoFeB/MgO. The effective DMI…
Laser-induced charge and spin photocurrents at BiAg surface: a first principles benchmark
T. Adamantopoulos, M. Merte, D. Go +3
Here, we report first principles calculations and analysis of laser-induced photocurrents at the surface of a prototype Rashba system. By referring to Keldysh non-equilibrium forma…
Crystal Hall and crystal magneto-optical effect in thin films of SrRuO
K. Samanta, M. LežaiÄ, M. Merte +3
Motivated by the recently observed topological Hall effect in ultra-thin films of SrRuO (SRO) grown on SrTiO (STO) [001] substrate, we investigate the magnetic ground state…
Single domain spectroscopic signatures of a magnetic Kagome metal
L. Plucinski, G. Bihlmayer, Y. Mokrousov +7
Spin- and orbital-resolved access to the electronic bands is necessary to establish key properties of quantum materials such as the quantum-geometric tensor. Despite recent revival…
Orbital Rashba effect as a platform for robust orbital photocurrents
T. Adamantopoulos, M. Merte, D. Go +3
Orbital current has emerged over the past years as one of the key novel concepts in magnetotransport. Here, we demonstrate that laser pulses can be used to generate large and robus…
Photocurrents of charge and spin in single-layer FeGeTe
M. Merte, F. Freimuth, T. Adamantopoulos +7
In the realm of two-dimensional materials magnetic and transport properties of a unique representative FeGeTe attract ever increasing attention. Here, we use a deve…
Distinct magnetotransport and orbital fingerprints of chiral bobbers
M. Redies, F. R. Lux, J. -P. Hanke +5
While chiral magnetic skyrmions have been attracting significant attention in the past years, recently, a new type of a chiral particle emerging in thin films a chiral bobber $…
Antiferromagnetic Switching in MnAu Using a Novel Laser Induced Optical Torque on Ultrafast Timescales
J. L. Ross, P-I. Gavriloaea, F. Freimuth +6
Efficient manipulation of the Néel vector in antiferromagnets can be induced by generation of spin orbit (SOT) or spin-transfer (STT) torques. Here we predict another possibility…
Spin-orbital mixing in the topological ladder of the two-dimensional metal PtTe
M. Qahosh, M. Masilamani, H. Boban +9
We visualize the topological ladder and band inversions in PtTe using spin-polarized photoemission spectroscopy augmented by three-dimensional momentum imaging. This approach e…
Magnonic Weyl states in Cu2OSeO3
L. Zhang, Y. A. Onykiienko, P. M. Buhl +8
The multiferroic ferrimagnet CuOSeO with a chiral crystal structure attracted a lot of recent attention due to the emergence of magnetic skyrmion order in this material. He…
Dzyaloshinskii-Moriya interaction and Hall effects in the skyrmion phase of MnFeGe alloys
J. Gayles, F. Freimuth, T. Schena +6
We carry out density functional theory calculations which demonstrate that the electron dynamics in the skyrmion phase of Fe-rich MnFeGe alloys is governed by Berry pha…
Real-Space and Reciprocal-Space Berry Phases in the Hall Effect of MnFeSi
C. Franz, F. Freimuth, A. Bauer +8
We report an experimental and computational study of the Hall effect in MnFeSi, as complemented by measurements in MnCoSi, when helimagn…
Femtosecond control of electric currents at the interfaces of metallic ferromagnetic heterostructures
T. J. Huisman, R. V. Mikhaylovskiy, J. D. Costa +8
The idea to utilize not only the charge but also the spin of electrons in the operation of electronic devices has led to the development of spintronics, causing a revolution in how…
Topological Crystalline Insulator and Quantum Anomalous Hall States in IV-VI based Monolayers and their Quantum Wells
C. Niu, P. M. Buhl, G. Bihlmayer +3
Different from the two-dimensional (2D) topological insulator, the 2D topological crystalline insulator (TCI) phase disappears when the mirror symmetry is broken, e.g., upon placin…
Maximally Localized Wannier Functions within the FLAPW formalism
F. Freimuth, Y. Mokrousov, D. Wortmann +2
We report on the implementation of the Wannier Functions (WFs) formalism within the full-potential linearized augmented plane wave method (FLAPW), suitable for bulk, film and one-d…
Mixed topology ring states for Hall effect and orbital magnetism in skyrmions of Weyl semimetals
M. Redies, F. R. Lux, J. -P. Hanke +3
Skyrmion lattices as a novel type of chiral spin states are attracting increasing attention, owing to their peculiar properties stemming from real-space topological properties. At…
Photocurrents, inverse Faraday effect and photospin Hall effect in MnAu
M. Merte, F. Freimuth, D. Go +6
Among antiferromagnetic materials, MnAu is one of the most intensively studied, and it serves as a very popular platform for testing various ideas related to antiferromagnetic…
Ab initio analysis of magnetic properties of prototype B20 chiral magnet FeGe
S. Grytsiuk, M. Hoffmann, J. -P. Hanke +4
FeGe in the B20 phase is an experimentally well-studied prototypical chiral magnet exhibiting helical spirals, skyrmion lattices and individual skyrmions with a robust length of 70…
The chiral Hall effect in canted ferromagnets and antiferromagnets
J. Kipp, K. Samanta, F. R. Lux +7
The anomalous Hall effect has been indispensable in our understanding of numerous magnetic phenomena. This concerns both ferromagnetic materials, as well as diverse classes of anti…
Interplay of structure and spin-orbit strength in magnetism of metal-benzene sandwiches: from single molecules to infinite wires
Y. Mokrousov, N. Atodiresei, G. Bihlmayer +2
Based on first-principles density functional theory calculations we explore electronic and magnetic properties of experimentally producible sandwiches and infinite wires made of re…
Non-Fermi liquid behavior in transport through Co doped Au chains
S. Di Napoli, A. Weichselbaum, P. Roura-Bas +3
We calculate the conductance as a function of temperature through Au monoatomic chains containing one Co atom as a magnetic impurity, and connected to two conducting leads w…
Novel type of atomic-scale spin lattice at a surface and its emergent Hall effect
M. Hoffmann, J. Weischenberg, B. Dupe +4
We predict the occurrence of a novel type of atomic-scale spin lattice in an Fe monolayer on the Ir(001) surface. Based on density functional theory calculations we parametrize a s…
Topological response of the anomalous Hall effect in MnBi2Te4 due to magnetic canting
S. -K. Bac, K. Koller, F. Lux +15
Three-dimensional (3D) compensated MnBi2Te4 is antiferromagnetic, but undergoes a spin-flop transition at intermediate fields, resulting in a canted phase before saturation. In thi…
Unusual Kondo physics in a Co impurity atom embedded in noble-metal chains
S. Di Napoli, M. A. Barral, P. Roura-Bas +3
We analyze the conduction bands of the one dimensional noble-metal chains that contain a Co magnetic impurity by means of ab initio calculations. We compare the results obtained fo…
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…