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Stability of Hopfions in Bulk Magnets with Competing Exchange Interactions
Moritz Sallermann, Hannes Jónsson, Stefan Blügel
Magnetic hopfions are string-like three-dimensional topological solitons, characterised by the Hopf invariant. They serve as a fundamental prototype for three-dimensional magnetic…
Topological magnons driven by the Dzyaloshinskii-Moriya interaction in the centrosymmetric ferromagnet MnGe
M. dos Santos Dias, N. Biniskos, F. J. dos Santos +7
The phase of the quantum-mechanical wave function can encode a topological structure with wide-ranging physical consequences, such as anomalous transport effects and the existence…
Ab-initio calculation of the Hubbard and Hund exchange in local moment magnets: The case of Mn-based full Heusler compounds
M. Tas, E. Sasioglu, S. Blugel +2
Mn-based full Heusler compounds possess well-defined local atomic Mn moments, and thus the correlation effects between localized d electrons are expected to play an important role…
Geometry-induced spin-filtering in photoemission maps from WTe surface states
Tristan Heider, Gustav Bihlmayer, Jakub Schusser +5
We demonstrate that an important quantum material WTe exhibits a new type of geometry-induced spin-filtering effect in photoemission, stemming from low symmetry that is respons…
Rashba-like spin textures in Graphene promoted by ferromagnet-mediated Electronic-Hybridization with heavy metal
Beatriz Muñiz Cano, Adrían Gudín, Jaime Sánchez-Barriga +17
Epitaxial graphene/ferromagnetic metal (Gr/FM) heterostructures deposited onto heavy metals (HM) have been proposed for the realization of novel spintronic devices because of their…
Diversity of states in a chiral magnet nanocylinder
Andrii S. Savchenko, Fengshan Zheng, Nikolai S. Kiselev +4
The diversity of three-dimensional magnetic states in a FeGe nanocylinder is studied using micromagnetic simulations and off-axis electron holography in the transmission electron m…
Chiral standing spin waves in skyrmion lattice
Andrii S. Savchenko, Vladyslav M. Kuchkin, Filipp N. Rybakov +2
This work studies the resonance excitations of the three-dimensional skyrmions lattice in the finite thickness plate of an isotropic chiral magnet using spin dynamics simulations.…
Skyrmionic Spin Structures in Layered Fe5GeTe2 Up To Room Temperature
Maurice Schmitt, Thibaud Denneulin, András Kovács +12
The role of the crystal lattice, temperature and magnetic field for the spin structure formation in the 2D van der Waals magnet Fe5GeTe2 is a key open question. Using Lorentz trans…
Construction of the spectral function from non-commuting spectral moment matrices
Frank Freimuth, Stefan Blügel, Yuriy Mokrousov
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 acces…
Ultrafast optical generation of antiferromagnetic meron-antimeron pairs with conservation of topological charge
Sumit Ghosh, Stefan Blügel, Yuriy Mokrousov
We propose a new mechanism to produce a meron-antimeron pair in a two dimensional antiferromagnet with an ultrafast laser pulse via thermal Schwinger mechanism. Unlike ultrafast sk…
Fermi-surface origin of skyrmion lattices in centrosymmetric rare-earth intermetallics
Juba Bouaziz, Eduardo Mendive-Tapia, Stefan Blügel +1
We show from first-principles that barrel-shaped structures within the Fermi surface of the centrosymmetric intermetallic compounds GdRuSi and GdPdSi give rise to F…
Microscopic origin of scalar potential induced topological transition in massive Dirac fermions and scalar Hall effect
Sumit Ghosh, Yuriy Mokrousov, Stefan Blügel
We present a systematic study of scalar potential induced topological transition in massive Dirac fermions. We show how a distribution of scalar potential can manipulate the signat…
Magnetic domain walls of the van der Waals material FeGeTe
Hung-Hsiang Yang, Namrata Bansal, Philipp Rüßmann +10
Among two-dimensional materials, FeGeTe has come to occupy a very important place owing to its ferromagnetic nature with one of the highest Curie temperatures among known v…
Is there a polaron signature in angle-resolved photoemission of CsPbBr3?
Maryam Sajedi, Maxim Krivenkov, Dmitry Marchenko +7
The formation of large polarons has been proposed as reason for the high defect tolerance, low mobility, low charge carrier trapping and low nonradiative recombination rates of lea…
Non-Collinear Spin Current for Switching of Chiral Magnetic Textures
Dongwook Go, Moritz Sallermann, Fabian R. Lux +3
We propose a concept of non-collinear spin current, whose spin polarization varies in space even in non-magnetic crystals. While it is commonly assumed that the spin polarization o…
Multiplet Effects in the Electronic Correlation of One-Dimensional Magnetic Transition-Metal Oxides on Metals
J. Goikoetxea, C. Friedrich, G. Bihlmayer +3
We use the constrained random phase approximation (cRPA) method to calculate the Hubbard parameter in four one-dimensional magnetic transition metal atom oxides of composition…
Emergence of zero-field non-synthetic single and interchanged antiferromagnetic skyrmions in thin films
Amal Aldarawsheh, Imara Lima Fernandes, Sascha Brinker +4
Antiferromagnetic (AFM) skyrmions are envisioned as ideal localized topological magnetic bits in future information technologies. In contrast to ferromagnetic (FM) skyrmions, they…
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…
Reply to 'Comment on "Proper and improper chiral magnetic interactions" '
Manuel dos Santos Dias, Sascha Brinker, András Lászlóffy +4
In our previous Letter [Phys. Rev. B 103, L140408 (2021)], we presented a discussion of the fundamental physical properties of the interactions parameterizing atomistic spin models…