575 citations · 850 across the 33 of their papers we have counts for
33 papers
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…
Decoding Crystallographic Surface Chirality from Real Space and Momentum Space Images by Machine Learning
Chetana Badala Viswanatha, Ka Man Yu, Benito Arnoldi +6
Intrinsically chiral metal surfaces, where handedness arises from the asymmetric step-kink-terrace topology of high-Miller index planes, are model systems for enantiospecific catal…
Reflective Metastructure Q-plate for Ultrashort Laser Pulses
Christopher G. O. Weiß, Bert Lägel, Benjamin Stadtmüller +2
The orbital angular momentum of light is an intriguing property for developing light driven applications. It emerged as an independent degree of freedom by which to manipulate ligh…
Transition from Optically Excited to Intrinsic Spin Polarization in WSe
Sebastian Hedwig, Gregor Zinke, Jürgen Braun +6
Layered 2D van der Waals materials, such as transition metal dichalcogenides, are promising for nanoscale spintronic and optoelectronic applications. Harnessing their full potentia…
Impact of Cooperativity on the Spatial and Temporal Evolution of the Light-induced Spin-State Switching of the Fe(phen)(SCN) Spin-Crossover Complex
Chetana Badala Viswanatha, Johannes Stöckl, Benito Arnoldi +7
Spin crossover (SCO) complexes are highly flexible bistable molecular switches with two distinct spin states that can be switched into each other by external stimuli such as temper…
All optical excitation of spin polarization in d-wave altermagnets
Marius Weber, Stephan Wust, Luca Haag +14
The recently discovered altermagnets exhibit collinear magnetic order with zero net magnetization but with unconventional spin-polarized d/g/i-wave band structures, expanding the k…
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…
Magnetic nutation: transient separation of magnetization from its angular momentum
Anulekha De, Julius Schlegel, Akira Lentfert +6
For nearly 90 years, precession and relaxation processes have been thought to dominate magnetization dynamics. Only recently has it been considered that, on short time scales, an i…
Spin transport and magnetic proximity effect in CoFeB/normal metal/Pt trilayers
Simon Häuser, Matthias R. Schweizer, Sascha Keller +7
We present a study of the damping and spin pumping properties of CoFeB/X/Pt systems with and . We show that the total damping of the CoFeB/Pt systems is stron…
Tailoring the ferromagnetic surface potential landscape by a templating two-dimensional metal-organic porous network
Lu Lyu, Martin Anstett, Ka Man Yu +3
Two-dimensional metal-organic porous networks (2D-MOPNs) have been identified as versatile nanoarchitectures to tailor surface electronic and magnetic properties on noble metals. I…
Temperature-driven confinements of surface electrons and adatoms in a weakly interacting 2D organic porous network
Lu Lyu, Jin Xiao, Zakaria M. Abd El-Fattah +11
Two-dimensional organic porous networks (2DOPNs) have opened new vistas for tailoring the physicochemical characteristics of metallic surfaces. These typically chemically bound nan…
Exploring the third dimension in quantum confinement of surface electrons
Lu Lyu, Tobias Eul, Wei Yao +7
Quantum confinement of surface electrons in two-dimensional metal-organic porous networks offers a powerful route to engineer electronic states for emerging quantum and spintronic…
Observation of time-reversal symmetry breaking in the band structure of altermagnetic RuO
O. Fedchenko, J. Minar, A. Akashdeep +20
Altermagnets are an emerging third elementary class of magnets. Unlike ferromagnets, their distinct crystal symmetries inhibit magnetization while, unlike antiferromagnets, they pr…
Coherent and incoherent magnons induced by strong ultrafast demagnetization in thin permalloy films
Anulekha De, Akira Lentfert, Laura Scheuer +4
Understanding spin dynamics on femto- and picosecond timescales offers new opportunities for faster and more efficient spintronic devices. Here, we experimentally investigate the c…
Competing signatures of intersite and interlayer spin transfer in the ultrafast magnetization dynamics
Simon Häuser, Sebastian T. Weber, Christopher Seibel +10
Optically driven intersite and interlayer spin transfer are individually known as the fastest processes for manipulating the spin order of magnetic materials on the sub 100 fs time…
Coherent magnetization dynamics in strongly quenched Ni thin films
Akira Lentfert, Anulekha De, Laura Scheuer +4
The remagnetization process after ultrafast demagnetization can be described by relaxation mechanisms between the spin, electron, and lattice reservoirs. Thereby, collective spin e…
Revealing Hidden Spin Polarization in Centrosymmetric van der Waals Materials on Ultrafast Timescales
Benito Arnoldi, Sara L. Zachritz, Sebastian Hedwig +3
One of the key challenges for spintronic and novel quantum technologies is to achieve active control of the spin angular momentum of electrons in nanoscale materials on ultrafast,…
Multiorbital exciton formation in an organic semiconductor
Wiebke Bennecke, Andreas Windischbacher, David Schmitt +13
Harnessing the optoelectronic response of organic semiconductors requires a thorough understanding of the fundamental light-matter interaction that is dominated by the excitation o…
Effect of iron thicknesses on spin transport in a Fe/Au bilayer system
J. Briones, M. Weber, B. Stadtmüller +2
This paper is concerned with a theoretical analysis of the behavior of optically excited spin currents in bilayer and multilayer systems of ferromagnetic and normal metals. As the…
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…
Twisted light affects ultrafast demagnetization
Eva Prinz, Benjamin Stadtmüller, Martin Aeschlimann
Irradiation with an ultrashort laser pulse can completely destroy the magnetic order of ferromagnetic thin films on the femtosecond timescale. This phenomenon holds great potential…
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…
Control of transport phenomena in magnetic heterostructures by wavelength modulation
Christopher Seibel, Marius Weber, Martin Stiehl +5
We demonstrate the tuneablity of the ultrafast energy flow in magnetic/non-magnetic bilayer structures by changing the wavelength of the optical excitation. This is achieved by an…
Atomic and mesoscopic structure of Dy-based surface alloys on noble metals
Sina Mousavion, Ka Man Yu, Mahalingam Maniraj +4
Surface alloys are a highly tunable class of low dimensional materials with the opportunity to tune and control the spin and charge carrier functionalities on the nanoscale. Here,…