Frank Freimuth
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View article: Spin and orbital magnetism by light in rutile altermagnets
Spin and orbital magnetism by light in rutile altermagnets Open
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, caloritronics and superconductivity. In the field of optical m…
View article: Efficient motion of 90^{\circ} domain walls in Mn_{2}Au via pure optical torques
Efficient motion of 90^{\circ} domain walls in Mn_{2}Au via pure optical torques Open
Discovering alternative ways to drive domain wall (DW) dynamics is crucial for advancing spintronic applications. Here we demonstrate via atomistic spin dynamics simulations that optical torques can efficiently drive 90^{\circ} DWs in the …
View article: Spin and Orbital Magnetism by Light in Rutile Altermagnets
Spin and Orbital Magnetism by Light in Rutile Altermagnets Open
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, caloritronics and superconductivity. In the field of optical m…
View article: Antiferromagnetic Switching in Mn$_2$Au Using a Novel Laser Induced Optical Torque on Ultrafast Timescales
Antiferromagnetic Switching in Mn$_2$Au Using a Novel Laser Induced Optical Torque on Ultrafast Timescales Open
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 for antiferromagnetic domain switching by using a non-zero s…
View article: Publisher Correction: Time-domain observation of ballistic orbital-angular-momentum currents with giant relaxation length in tungsten
Publisher Correction: Time-domain observation of ballistic orbital-angular-momentum currents with giant relaxation length in tungsten Open
View article: Time-domain observation of ballistic orbital-angular-momentum currents with giant relaxation length in tungsten
Time-domain observation of ballistic orbital-angular-momentum currents with giant relaxation length in tungsten Open
View article: Bandgaps of insulators from moment-functional based spectral density-functional theory
Bandgaps of insulators from moment-functional based spectral density-functional theory Open
Within the method of spectral moments it is possible to construct the spectral function of a many-electron system from the first $2P$ spectral moments ($P=1,2,3,\dots$). The case $P=1$ corresponds to standard Kohn-Sham density functional t…
View article: Orbital Rashba effect as a platform for robust orbital photocurrents
Orbital Rashba effect as a platform for robust orbital photocurrents Open
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 robust non-relativistic orbital currents in systems where the in…
View article: Construction of Wannier functions from the spectral moments of correlated electron systems
Construction of Wannier functions from the spectral moments of correlated electron systems Open
When the first four spectral moments are considered, spectral features missing in standard Kohn-Sham (KS) density-functional theory (DFT), such as upper and lower Hubbard bands, as well as spectral satellite peaks, can be described, and th…
View article: Time-domain observation of ballistic orbital-angular-momentum currents with giant relaxation length in tungsten
Time-domain observation of ballistic orbital-angular-momentum currents with giant relaxation length in tungsten Open
The emerging field of orbitronics exploits the electron orbital momentum $\textit{L}$. Compared to spin-polarized electrons, $\textit{L}$ may allow magnetic-information transfera with significantly higher density over longer distances in m…
View article: Moment potentials for spectral density functional theory: Exploiting the momentum distribution of the uniform electron gas
Moment potentials for spectral density functional theory: Exploiting the momentum distribution of the uniform electron gas Open
In standard Kohn-Sham (KS) density-functional theory (DFT) the valence band satellites in Ni and Pd are missing, the band widths in Ni and Na are too large, and the formation of lower and upper Hubbard bands in SrVO$_3$ is not described. T…
View article: Controlling 3D spin textures by manipulating sign and amplitude of interlayer DMI with electrical current
Controlling 3D spin textures by manipulating sign and amplitude of interlayer DMI with electrical current Open
The recently discovered interlayer Dzyaloshinskii-Moriya interaction (IL-DMI) in multilayers with perpendicular magnetic anisotropy favors the canting of spins in the in-plane direction and could thus enable new exciting spin textures such…
View article: Moment-functional based spectral density-functional theory
Moment-functional based spectral density-functional theory Open
We describe a density-functional method which aims at computing the ground state electron density and the spectral function at the same time. One basic ingredient of our method is the construction of the spectral function from the first fo…
View article: Construction of the spectral function from noncommuting spectral moment matrices
Construction of the spectral function from noncommuting spectral moment matrices Open
The LDA+U method is widely used to study the properties of realistic solids with strong electron correlations. One of its main shortcomings is that it does not provide direct access to the temperature dependence of material properties such…
View article: Driving spin chirality by electron dynamics in laser-excited antiferromagnets
Driving spin chirality by electron dynamics in laser-excited antiferromagnets Open
Despite recent successes in the area of ultrafast manipulation of magnetic order, optical generation and manipulation of complex spin textures is hindered by an insufficient theoretical understanding of underlying processes. In particular …
View article: Theory of unidirectional magnetoresistance and nonlinear Hall effect
Theory of unidirectional magnetoresistance and nonlinear Hall effect Open
We study the unidirectional magnetoresistance (UMR) and the nonlinear Hall effect (NLHE) in the ferromagnetic Rashba model. For this purpose we derive expressions to describe the response of the electric current quadratic in the applied el…
View article: Effect of magnons on the temperature dependence and anisotropy of spin-orbit torque
Effect of magnons on the temperature dependence and anisotropy of spin-orbit torque Open
We investigate the influence of magnons on the temperature-dependence and the\nanisotropy of the spin-orbit torque (SOT). For this purpose we use 3rd order\nperturbation theory in the framework of the Keldysh formalism in order to\nderive …
View article: Photocurrents of charge and spin in single-layer Fe$_3$GeTe$_2$
Photocurrents of charge and spin in single-layer Fe$_3$GeTe$_2$ Open
In the realm of two-dimensional materials magnetic and transport properties of a unique representative $-$ Fe$_3$GeTe$_2$ $-$ attract ever increasing attention. Here, we use a developed first-principles method for calculating laser-induced…
View article: Roadmap of spin-orbit torques
Roadmap of spin-orbit torques Open
Spin-orbit torque (SOT) is an emerging technology that enables the efficient manipulation of spintronic devices. The initial processes of interest in SOTs involved electric fields, spin-orbit coupling, conduction electron spins and magneti…
View article: Author Correction: Faster chiral versus collinear magnetic order recovery after optical excitation revealed by femtosecond XUV scattering
Author Correction: Faster chiral versus collinear magnetic order recovery after optical excitation revealed by femtosecond XUV scattering Open
A Correction to this paper has been published: https://doi.org/10.1038/s41467-021-21915-9
View article: Direct and inverse spin-orbit torques in antiferromagnetic and ferromagnetic FeRh/W(001)
Direct and inverse spin-orbit torques in antiferromagnetic and ferromagnetic FeRh/W(001) Open
We use \textit{ab-initio} calculations to investigate spin-orbit torques (SOTs) in FeRh(001) deposited on W(100). Since FeRh undergoes a ferromagnetic-antiferromagnetic phase transition close to room temperature, we consider both phases of…
View article: Data for the article "Faster chiral versus collinear magnetic order recovery after optical excitation revealed by femtosecond XUV scattering"
Data for the article "Faster chiral versus collinear magnetic order recovery after optical excitation revealed by femtosecond XUV scattering" Open
Data for the article "Faster chiral versus collinear magnetic order recovery after optical excitation revealed by femtosecond XUV scattering" (Faster chiral versus collinear magnetic order recovery after optical excitation revealed by femt…
View article: Data for the article "Faster chiral versus collinear magnetic order recovery after optical excitation revealed by femtosecond XUV scattering"
Data for the article "Faster chiral versus collinear magnetic order recovery after optical excitation revealed by femtosecond XUV scattering" Open
Data for the article "Faster chiral versus collinear magnetic order recovery after optical excitation revealed by femtosecond XUV scattering" (Faster chiral versus collinear magnetic order recovery after optical excitation revealed by femt…
View article: Chiral versus collinear magnetic order dynamics: faster chiral recovery after optical excitation revealed by femtosecond XUV scattering
Chiral versus collinear magnetic order dynamics: faster chiral recovery after optical excitation revealed by femtosecond XUV scattering Open
While chiral spin structures stabilized by Dzyaloshinskii-Moriya interaction (DMI) are candidates as novel information carriers, their dynamics on the fs-ps timescale is little known. Since with the bulk Heisenberg exchange and the interfa…
View article: Giant inverse Faraday effect in Dirac semimetals
Giant inverse Faraday effect in Dirac semimetals Open
We have studied helicity dependent photocurrent (HDP) in Bi-based Dirac semimetal thin films. HDP increases with film thickness before it saturates, changes its sign when the majority carrier type is changed from electrons to holes and tak…
View article: First-Principles Theory of Current-Induced Spin-Orbital Coupled Dynamics in Magnetic Heterostructures
First-Principles Theory of Current-Induced Spin-Orbital Coupled Dynamics in Magnetic Heterostructures Open
View article: Anisotropy and temperature-dependence of spin-orbit torques: Role of magnons
Anisotropy and temperature-dependence of spin-orbit torques: Role of magnons Open
We investigate the influence of magnons on the temperature-dependence and the anisotropy of the field-like component of the spin-orbit torque (SOT). For this purpose we use 3rd order perturbation theory in the framework of the Keldysh form…
View article: Engineering chiral and topological orbital magnetism of domain walls and skyrmions
Engineering chiral and topological orbital magnetism of domain walls and skyrmions Open
View article: Higher-dimensional Wannier Interpolation for the Modern Theory of the Dzyaloshinskii–Moriya Interaction: Application to Co-based Trilayers
Higher-dimensional Wannier Interpolation for the Modern Theory of the Dzyaloshinskii–Moriya Interaction: Application to Co-based Trilayers Open
We present an advanced first-principles formalism to evaluate the Dzyaloshinskii-Moriya interaction (DMI) in its modern theory as well as Berry curvatures in complex spaces based on a higher-dimensional Wannier interpolation. Our method is…
View article: Magnetic skyrmions: structure, stability, and transport phenomena
Magnetic skyrmions: structure, stability, and transport phenomena Open
The pioneering spintronic proposal of a spin field-effect transistor by Datta and Das motivated largely the research of the spin related behavior of electrons propagating in the potentials with structure inversion asymmetry (SIA). Owing to t…