255 citations · 1k across the 24 of their papers we have counts for
24 papers
Material systems for FM-/AFM-coupled skyrmions in Co/Pt-based multilayers
Hongying Jia, Bernd Zimmermann, Markus Hoffmann +3
By means of systematic first-principles calculations based on density functional theory we search for suitable materials that can host antiferromagnetically coupled skyrmions. We c…
Electric dipole moment as descriptor for interfacial Dzyaloshinskii-Moriya interaction
Hongying Jia, Bernd Zimmermann, Gregor Michalicek +2
Chiral magnets are of fundamental interest and have important technological ramifications. The origin of chiral magnets lies in the Dzyaloshinskii-Moriya interaction (DMI), an inte…
Comparison of first-principles methods to extract magnetic parameters in ultra-thin films: Co/Pt(111)
Bernd Zimmermann, Gustav Bihlmayer, Marie Böttcher +6
We compare three distinct computational approaches based on first-principles calculations within density functional theory to explore the magnetic exchange and the Dzyaloshinskii-M…
Dzyaloshinskii-Moriya interaction at disordered interfaces from ab initio theory: robustness against intermixing and tunability through dusting
Bernd Zimmermann, William Legrand, Davide Maccariello +4
The Dzyaloshinskii-Moriya interaction (DMI), which is essential for the stabilization of topologically non-trivial chiral magnetic textures such as skyrmions, is particularly stron…
First-principles investigation of chiral magnetic properties in multilayers: Rh/Co/Pt and Pd/Co/Pt
Hongying Jia, Bernd Zimmermann, Stefan Blügel
The magnetic properties of (111)-oriented Rh/Co/Pt and Pd/Co/Pt multilayers are investigated by first-principles calculations. We focus on the interlayer exchange coupling, and ide…
Non-local field-like spin-orbit torques in Rashba systems: an ab-initio study of AgBi/Ag/Fe film
Guillaume Géranton, Bernd Zimmermann, Nguyen H. Long +4
We investigate from first principles the field-like spin-orbit torques (SOTs) in a AgBi-terminated Ag(111) film grown on ferromagnetic Fe(110). We find that a large part of t…
Antiskyrmions stabilized at interfaces by anisotropic Dzyaloshinskii-Moriya interaction
Markus Hoffmann, Bernd Zimmermann, Gideon P. Müller +4
Chiral magnets are an emerging class of topological matter harbouring localized and topologically protected vortex-like magnetic textures called skyrmions, which are currently unde…
Influence of complex disorder on skew-scattering Hall effects in -ordered FePt alloy
Bernd Zimmermann, Nguyen H. Long, Phivos Mavropoulos +2
We show by first-principles calculations that the skew-scattering anomalous Hall and spin-Hall angles of L-ordered FePt drastically depend on different types of disorder. A di…
Strong spin-orbit fields and Dyakonov-Perel spin dephasing in supported metallic films
Nguyen H. Long, Phivos Mavropoulos, David S. G. Bauer +3
Spin dephasing by the Dyakonov-Perel mechanism in metallic films deposited on insulating substrates is revealed, and quantitatively examined by means of density functional calculat…
Role of Dzyaloshinskii-Moriya interaction for magnetism in transition-metal chains at Pt step-edges
Benedikt Schweflinghaus, Bernd Zimmermann, Marcus Heide +2
We explore the emergence of chiral magnetism in one-dimensional monatomic Mn, Fe, and Co chains deposited at the Pt(664) step-edge carrying out an ab-initio study based on density…
Giant spin Nernst effect induced by resonant scattering at surfaces of metallic films
Nguyen H. Long, Phivos Mavropoulos, Bernd Zimmermann +2
A new concept realizing giant spin Nernst effect in nonmagnetic metallic films is introduced. It is based on the idea of engineering an asymmetric energy dependence of the longitud…
Spin-orbit torques and spin accumulation in FePt/Pt and Co/Cu thin films from first principles: the role of impurities
Guillaume Géranton, Bernd Zimmermann, Nguyen Hoang Long +4
Using the Boltzmann formalism based on the first principles electronic structure and scattering rates, we investigate the current-induced spin accumulation and spin-orbit torques i…
Fermi surfaces, spin-mixing parameter, and colossal anisotropy of spin relaxation in transition metals from ab initio theory
Bernd Zimmermann, Phivos Mavropoulos, Nguyen H. Long +3
The Fermi-surfaces and Elliott-Yafet spin-mixing parameter (EYP) of several elemental metals are studied by \emph{ab initio} calculations. We focus first on the anisotropy of the E…
RKKY-like contributions to the magnetic anisotropy energy: 3d adatoms on Pt(111) surface
Mohammed Bouhassoune, Manuel dos Santos Dias, Bernd ZImmermann +2
The magnetic anisotropy energy defines the energy barrier that stabilizes a magnetic moment. Utilizing density functional theory based simulations and analytical formulations, we e…
Quantum well states and amplified spin-dependent Friedel oscillations in thin films
Mohammed Bouhassoune, Bernd Zimmermann, Phivos Mavropoulos +4
Electrons mediate many of the interactions between atoms in a solid. Their propagation in a material determines its thermal, electrical, optical, magnetic and transport properties.…
First-principles analysis of a homo-chiral cycloidal magnetic structure in a monolayer Cr on W(110)
Bernd Zimmermann, Marcus Heide, Gustav Bihlmayer +1
The magnetic structure of a Cr monolayer on a W(110) substrate is investigated by means of first-principles calculations based on the noncollinear spin density functional theory (D…
Dzyaloshinskii-Moriya interaction and chiral magnetism in 3-5 zig-zag chains: Tight-binding model and ab initio calculations
Vikas Kashid, Timo Schena, Bernd Zimmermann +4
We investigate the chiral magnetic order in free-standing planar 3-5 bi-atomic metallic chains (3: Fe, Co; 5: Ir, Pt, Au) using first-principles calculations based on d…
Skew scattering in dilute ferromagnetic alloys
Bernd Zimmermann, Kristina Chadova, Diemo Ködderitzsch +8
The challenging problem of skew scattering for Hall effects in dilute ferromagnetic alloys, with intertwined effects of spin-orbit coupling, magnetism and impurity scattering, is s…
Spin relaxation and spin Hall transport in 5d transition-metal ultrathin films
Nguyen H. Long, Phivos Mavropoulos, Bernd Zimmermann +3
The spin relaxation induced by the Elliott-Yafet mechanism and the extrinsic spin Hall conductivity due to the skew-scattering are investigated in 5d transition-metal ultrathin fil…
Spin-flip hot spots in ultrathin films of monovalent metals: Enhancement and anisotropy of the Elliott-Yafet parameter
Nguyen H. Long, Phivos Mavropoulos, Swantje Heers +3
In contrast to the long-known fact that spin-flip hot spots, i.e., special \vc{k}-points on the Fermi surface showing a high spin-mixing parameter, do not occur in the bulk of mono…
Spin relaxation and the Elliott-Yafet parameter in W(001) ultrathin films: surface states, anisotropy and oscillation effects
Nguyen H. Long, Phivos Mavropoulos, Bernd Zimmermann +4
Using first-principles methods based on density-functional theory we investigate the spin relaxation in W(001) ultrathin films. Within the framework of the Elliott-Yafet theory we…
Anisotropy of spin relaxation in metals
Bernd Zimmermann, Phivos Mavropoulos, Swantje Heers +3
The concept of anisotropy of spin relaxation in non-magnetic metals with respect to the spin direction of the injected electrons relative to the crystal orientation is introduced.…
Anisotropy of spin relaxation and transverse transport in metals
Yuriy Mokrousov, Hongbin Zhang, Frank Freimuth +6
Using first principles methods we explore the anisotropy of the spin relaxation and transverse transport properties in bulk metals with respect to the direction of the spin quantiz…
In-plane dipole coupling anisotropy of a square ferromagnetic Heisenberg monolayer
M. Dantziger, B. Glinsmann, S. Scheffler +2
In this study we calculate the dipole-coupling-induced quartic in-plane anisotropy of a square ferromagnetic Heisenberg monolayer. This anisotropy increases with an increasing temp…