181 citations · 637 across the 27 of their papers we have counts for
14 papers · 1 filter
Dynamic interfacial effects in ultrathin ferromagnetic bilayers
Anulekha De, Christopher Seibel, Sanjay Ashok +7
We investigate the magnetization dynamics of an ultrathin Co (1.5 nm) /Py (1.5 nm) bilayer system from femtosecond (fs) to nanosecond (ns) timescales. Magnetization dynamics in the…
Signatures of ballistic and diffusive transport in the time-dependent Kerr-response of magnetic materials
Sanjay Ashok, Jonas Hoefer, Martin Stiehl +4
We calculate the influence of diffusive and ballistic transport on ultrafast magnetization in thick metallic films. When only diffusive transport is present, gradients of magnetiza…
Influence of band occupation on electron-phonon coupling in gold
Tobias Held, Sebastian T. Weber, Baerbel Rethfeld
Electron-phonon coupling is a fundamental process that governs the energy relaxation dynamics of solids excited by ultrafast laser pulses. It has been found to strongly depend on e…
Interplay of electron-magnon scattering and spin-orbit induced electronic spin-flip scattering in a two-band Stoner model
Félix Dusabirane, Kai Leckron, Baerbel Rethfeld +1
This paper presents a theoretical investigation of electron-magnon scattering processes in the ultrafast demagnetization in itinerant ferromagnets. In the framework of a ferromagne…
Laser-induced Creation of antiferromagnetic 180-degree domains in NiO/Pt bilayers
Hendrik Meer, Stephan Wust, Christin Schmitt +15
We demonstrate how the antiferromagnetic order in heterostructures of NiO/Pt thin films can be modified by optical pulses. We irradiate our samples with laser light and identify an…
Indirect optical manipulation of the antiferromagnetic order of insulating NiO by ultrafast interfacial energy transfer
Stephan Wust, Christopher Seibel, Hendrik Meer +14
We report the ultrafast, (sub)picosecond reduction of the antiferromagnetic order of the insulating NiO thin film in a Pt/NiO bilayer. This reduction of the antiferromagnetic order…
Implementation of the electronic non-equilibrium in the two-temperature model
Markus Uehlein, Sebastian T. Weber, Baerbel Rethfeld
We investigate a temperature-based model, called extended two-temperature model (eTTM), that describes the electronic non-equilibrium and its effect on energy dissipation in metals…
Monte Carlo simulation of ultrafast nonequilibrium spin and charge transport in iron
J. Briones, H. C. Schneider, B. Rethfeld
Spin transport and spin dynamics after femtosecond laser pulse irradiation of iron (Fe) are studied using a kinetic Monte Carlo model. This model simulates spin dependent dynamics…
Particle-in-cell simulation of ultrafast hot-carrier transport in Fe/Au-heterostructures
Dennis M. Nenno, Bärbel Rethfeld, Hans Christian Schneider
We describe a theoretical approach for spin-polarized hot-electron transport, as it occurs after excitation by ultrafast optical pulses in heterostructures formed by ferromagnetic…
Wavelength-dependent reflectivity changes on gold at elevated electronic temperatures
A. Blumenstein, E. S. Zijlstra, D. S. Ivanov +7
Upon the excitation by an ultrashort laser pulse the conditions in a material can drastically change, altering its optical properties and therefore the relative amount of absorbed…
Relaxation of a nonequilibrium phonon distribution induced by femtosecond laser irradiation
Isabel Klett, Baerbel Rethfeld
Ultrafast laser irradiation of solids leads to a thermodynamic nonequilibrium within and between the electron and phonon subsystems of the material. Due to electron-electron and ph…
Atomistic-continuum modeling of short laser pulse melting of Si targets
V. P. Lipp, B. Rethfeld, M. E. Garcia +1
We present an atomistic-continuum model to simulate ultrashort laser-induced melting processes in semiconductor solids on the example of silicon. The kinetics of transient non-equi…
Driving ferromagnets into a critical region of a magnetic phase diagram
B. Y. Mueller, B. Rethfeld
Exciting a ferromagnetic sample with an ultrashort laser pulse leads to a quenching of the magne- tization on a subpicosecond timescale. On the basis of the equilibration of intens…
Driving Force of Ultrafast Magnetization Dynamics
Benedikt Y. Mueller, T. Roth, M. Cinchetti +2
Irradiating a ferromagnetic material with an ultrashort laser pulse leads to demagnetization on a femtosecond timescale. We implement Elliott-Yafet type spin-flip scattering, media…