57 citations · 297 across the 26 of their papers we have counts for
26 papers
Chiral magnons in altermagnetic RuO2
Libor Šmejkal, Alberto Marmodoro, Kyo-Hoon Ahn +8
Magnons in ferromagnets have one chirality, and typically are in the GHz range and have a quadratic dispersion near the zero wavevector. In contrast, magnons in antiferromagnets ar…
Temperature-induced changes in the magnetism of Laves phase rare-earth--iron intermetallics by ab~initio calculations
Ondrej Sipr, Sergey Mankovsky, Jiri Vackar +2
Laves RFe2 compounds, where R is a rare earth, exhibit technologically relevant properties associated with the interplay between their lattice geometry and magnetism. We apply ab~i…
Electric field control of magnons in magnetic thin films: ab initio predictions for 2D metallic heterostructures
Alberto Marmodoro, Sergiy Mankovsky, Hubert Ebert +2
We explore possibilities for control of magnons in two-dimensional heterostructures by an external electric field acting across a dielectric barrier. By performing ab-initio calcul…
Spin-spiral state of a Mn monolayer on W(110) studied by soft x-ray absorption spectroscopy at variable temperatures
J. Honolka, S. Krotzky, M. Menzel +7
The noncollinear magnetic state of epitaxial Mn monolayers on tungsten (110) crystal surfaces is investigated by means of soft x-ray absorption spectroscopy, to complement earlier…
First principles calculations of steady-state voltage-controlled magnetism: application to x-ray absorption spectroscopy experiment
Alberto Marmodoro, Sebastian Wimmer, Ondrej Sipr +2
Recent x-ray absorption experiments have demonstrated the possibility to accurately monitor the magnetism of metallic hetero-structures controlled via a time-independent perturbati…
Assessing different approaches to ab initio calculations of spin wave stiffness
Ondrej Sipr, Sergey Mankovsky, Hubert Ebert
Ab initio calculations of the spin wave stiffness constant for elemental Fe and Ni performed by different groups in the past have led to values with a considerable spread of 50…
Electronic structure of -SiAlON: effect of varying Al/O concentration at finite temperatures relevant for thermal quenchin
Ondrej Sipr, Saleem Ayaz Khan, Jiri Vackar +4
-SiAlON is a prominent example of systems suitable as hosts for creating materials for light-emitting diodes. In this work, the electronic structure…
Effect of lattice excitations on transient near edge X-ray absorption spectroscopy
N. Rothenbach, M. E. Gruner, K. Ollefs +17
Time-dependent and constituent-specific spectral changes in soft near edge X-ray spectroscopy (XAS) of an [Fe/MgO] metal/insulator heterostructure upon laser excitation are ana…
Transport properties of doped permalloy via ab-initio calculations: effect of the host disorder
Ondrej Sipr, Sebastian Wimmer, Sergey Mankovsky +1
Transport properties of permalloy doped with V, Co, Pt, and Au are explored via ab-initio calculations. The Kubo-Bastin formula is evaluated within the fully relativistic Korringa-…
Spin wave stiffness and exchange stiffness of doped permalloy via ab-initio calculation
Ondrej Sipr, Sergey Mankovsky, Hubert Ebert
The way doping affects the spin wave stiffness and the exchange stiffness of permalloy (Py) is investigated via ab-initio calculations, using the Korringa-Kohn-Rostoker (KKR) Green…
Local geometry around B atoms in B/Si(111) from polarized x-ray absorption spectroscopy
Saleem Ayaz Khan, Martin Vondráček, Peter Blaha +4
The arrangement of B~atoms in a doped Si(111)-:B system was studied using near-edge x-ray absorption fine structure (NEXAFS). Boron atoms were…
Ca and S K-edge XANES of CaS calculated by different methods: influence of full potential, core hole and Eu doping
Ondrej Sipr, Wilayat Khan, Yves Joly +1
Ca and S K-edge spectra of CaS are calculated by the full-potential Green's function multiple-scattering method, by the FLAPW method, and by the finite difference method. All three…
Finite lifetime broadening of calculated x-ray absorption spectra: possible artefacts close to the edge
Ondrej Sipr, Jiri Vackar, Jan Minar
X-ray absorption spectra calculated within an effective one-electron approach have to be broadened to account for the finite lifetime of the core hole. For Green's function based m…
Local environment effects in the magnetic properties and electronic structure of disordered FePt
Saleem Ayaz Khan, Jan Minár, Hubert Ebert +2
Local aspects of magnetism of disordered FePt are investigated by ab initio fully relativistic full potential calculations, employing the supercell approach and the coherent potent…
Influence of spin-orbit coupling on the magnetic dipole term
Ondrej Sipr, Jan Minar, Hubert Ebert
The influence of the spin-orbit coupling (SOC) on the magnetic dipole term is studied across a range of systems in order to check whether the term can be eliminated fro…
Including atomic vibrations in XANES calculations: polarization-dependent damping of the fine structure at the Cu K edge of (creat)CuCl
Ondrej Sipr, Jiri Vackar, Alexei Kuzmin
Atomic vibrations are usually not taken into account when analyzing x-ray absorption near edge structure (XANES) spectra. One of the reasons is that including the vibrations in a f…
Illustrative view on the magnetocrystalline anisotropy of adatoms and monolayers
Ondrej Sipr, Sergey Mankovsky, Svitlana Polesya +3
Even though it has been known for decades that the magnetocrystalline anisotropy is linked to the spin-orbit coupling (SOC), the mechanism how it arises for specific systems is sti…
Trends in magnetism of free Rh clusters via relativistic ab-initio calculations
Ondrej Sipr, Hubert Ebert, Jan Minar
A fully relativistic ab-initio study on free Rh clusters of 13-135 atoms is performed to identify general trends concerning their magnetism and to check whether concepts which prov…
Single 3 transition metal atoms on multi-layer graphene systems: electronic configurations, bonding mechanisms and role of the substrate
V. Sessi, S. Stepanow, A. N. Rudenko +8
The electronic configurations of Fe, Co, Ni, and Cu adatoms on graphene and graphite have been studied by x-ray magnetic circular dichroism and charge transfer multiplet theory. A…
Magnetocrystalline anisotropy energy for adatoms and monolayers on non-magnetic substrates: where does it comes from?
Ondrej Sipr, Sven Bornemann, Hubert Ebert +1
The substrate contribution to the magnetic anisotropy energy (MAE) of supported nanostructures can be quantified by a site-selective manipulation of the spin-orbit coupling (SOC) a…
Co monolayers and adatoms on Pd(100), Pd(111) and Pd(110): Anisotropy of magnetic properties
Ondrej Sipr, Sven Bornemann, Hubert Ebert +3
We investigate to what extent the magnetic properties of deposited nanostructures can be influenced by selecting as a support different surfaces of the same substrate material. Ful…
Trends in the magnetic properties of Fe, Co and Ni clusters and monolayers on Ir(111), Pt(111) and Au(111)
S. Bornemann, O. Šipr, S. Mankovsky +5
We present a detailed theoretical investigation on the magnetic properties of small single-layered Fe, Co and Ni clusters deposited on Ir(111), Pt(111) and Au(111). For this a full…
Many-body effects in x-ray absorption and magnetic circular dichroism spectra within the LSDA+DMFT framework
O. Sipr, J. Minar, A. Scherz +2
The theoretical description of photoemission spectra of transition metals was greatly improved recently by accounting for the correlations between the d electrons within the local…
Finite-temperature magnetism of FePd and CoPt alloys
S. Polesya, S. Mankovsky, O. Sipr +3
The finite-temperature magnetic properties of FePd and CoPt alloys have been investigated. It is shown that the temperature-dependent magnetic behaviour of…