30 citations · 40 across the 18 of their papers we have counts for
20 papers
Magnon chiral damping beyond the Dzyaloshinskii-Moriya interaction
Darpa Narayan Basu, Subhadip Ghosh, Peter M. Oppeneer +2
Magnon chiral damping denotes damping that is asymmetric with respect to the magnon wave vector. Such nonreciprocity has been attributed to antisymmetric Dzyaloshinskii-Moriya spin…
Spurious spin nutation modes arising from truncated memory effects
Markus Weißenhofer, Ritwik Mondal, M. S. Mrudul +1
Spin dynamics is conventionally treated as inertia-free. The inertial Landau-Lifshitz-Gilbert equation (iLLG) extends this with a second-order time derivative, predicting a high-fr…
Interfacial orbital torques excite nanoscale terahertz magnons
Harshita Devda, Peter M. Oppeneer, Ulrich Nowak
Exchange-dominated magnons in nanometer-thick ferromagnets extend to the terahertz regime through thickness quantization of perpendicular standing spin-wave (PSSW) modes. While int…
Unlocking ultrafast spin dynamics in a rare-earth magnet
Paul Herrgen, Christian Holzmann, Torben Manzke +5
The speed of optically driven magnetization dynamics is fundamentally determined by how efficiently angular momentum can be transferred between electronic, spin and lattice degrees…
A crystal-field route to THz-driven magnetization
T. Zalewski, M. S. Mrudul, Y. Lee +5
Light carries angular momentum, but the microscopic pathways that transform it into magnetization remain elusive. Here we establish that crystal-field excitations, historically vie…
Symmetry-Enforced Chiral Phonons in Altermagnets via Magnon-Phonon Coupling
Philipp Rieger, Markus Weißenhofer, Sergiy Mankovsky +1
Chiral phonons are attractive for spintronics applications, however, their zero-field generation in conventional antiferromagnets is forbidden by combined parity and time-reversal…
Valley-polarized Orbital and Spin Magnetism Induced by Femtosecond Optical Pulses in Two-Dimensional Semiconductors
M. S. Mrudul, Peter M. Oppeneer
We theoretically investigate the ultrafast generation of spin and orbital magnetism in a two-dimensional gapped Dirac system with spin-orbit coupling. This system is representative…
Huge ultrafast spin Seebeck effect mediated by laser-excited superdiffusive magnon currents
Luca Mikadze, Peter M. Oppeneer, Markus Weißenhofer
Subpicosecond laser excitation of ferromagnetic metals induces strongly nonequilibrium dynamics involving scattering and transport of electrons, phonons, and magnons. Widely used t…
Relativistic theory for coupled orbital and spin angular momentum dynamics in magnetic systems
Subhadip Santra, Ritwik Mondal, Marco Berritta +1
We develop a complete relativistic theory to describe the dynamics of electronic angular momentum including both spin (S) and orbital (L) contributions in magnetic systems. We star…
Symmetry-Selective Topological Magnon Engineering by Phonon Angular Momentum
Markus Weißenhofer, Philipp Rieger, Chandan K. Singh +3
Dynamical control of Berry curvature remains an outstanding challenge in the engineering of topological phases. Here, we demonstrate control of magnon band structures via coherentl…
Tunnel-Barrier-Engineered Ultrafast Demagnetization and Spin Transport in Graphene-Based Heterostructures
Suchetana Mukhopadhyay, David Muradas-Belinchon, Francesco Foggetti +3
Heterostructures combining graphene with 3d transition metal ferromagnets (FMs) enable various spin-based phenomena at ultrafast timescales. However, challenges such as the interfa…
Optimizing spin-based terahertz emission from magnetic heterostructures
Francesco Foggetti, Francesco Cosco, Peter M. Oppeneer +4
Terahertz radiation pulses can be generated efficiently through femtosecond laser excitation of a ferromagnetic/nonmagnetic heterostructure, wherein an ultrafast laser-induced spin…
Anatomy of spin-orbit-torque-assisted magnetization dynamics in Co/Pt bilayers: Importance of the orbital torque
Harshita Devda, András Deák, Leandro Salemi +4
Understanding the mechanism driving magnetization switching in spin-orbit-torque-assisted devices remains a subject of debate. While originally attributed to the spin Hall effect a…
Generation of Phonons with Angular Momentum During Ultrafast Demagnetization
M. S. Mrudul, Markus Weißenhofer, Peter M. Oppeneer
A major question in the field of femtosecond laser-induced demagnetization is whereto the angular momentum lost by the electrons is transferred. Recent ultrafast electron diffracti…
Cavity-assisted magnetization switching in a quantum spin-phonon chain
Mohsen Yarmohammadi, Peter M. Oppeneer, James K. Freericks
We propose a Néel magnetization switching mechanism in a hybrid magnon-phonon optical cavity system. A terahertz-pumped single-mode cavity photon couples to a spin-phonon chain, wh…
Quantitative modeling of spintronic terahertz emission due to ultrafast spin transport
Francesco Foggetti, Peter M. Oppeneer
In spintronic terahertz emitters, THz radiation is generated by exciting an ultrafast spin current through femtosecond laser excitation of a ferromagnetic-nonmagnetic metallic hete…
Chiral Phonons Arising From Chirality-Selective Magnon-Phonon Coupling
Markus Weißenhofer, Philipp Rieger, M. S. Mrudul +3
Chiral phonons are desirable for applications in spintronics but their generation and control remains a challenge.Here we demonstrate the emergence of truly chiral phonons from sel…
Element-selective probing of ultrafast ferromagnetic--antiferromagnetic order dynamics in Fe/CoO bilayers
Chowdhury S. Awsaf, Sangeeta Thakur, Markus Weißenhofer +6
The ultrafast magnetization dynamics of an epitaxial Fe/CoO bilayer on Ag(001) is examined in an element-resolved way by resonant soft-x-ray reflectivity. The transient magnetic li…
Element-specific ultrafast lattice dynamics in FePt nanoparticles
Diego Turenne, Igor Vaskivskiy, Klaus Sokolowski-Tinten +14
Light-matter interaction at the nanoscale in magnetic alloys and heterostructures is a topic of intense research in view of potential applications in high-density magnetic recordin…
Inertial effects in ultrafast spin dynamics
Ritwik Mondal, Levente Rózsa, Michael Farle +3
The dynamics of magnetic moments consist of a precession around the magnetic field direction and a relaxation towards the field to minimize the energy. While the magnetic moment an…