Publications (18)
Spirit: Multifunctional Framework for Atomistic Spin Simulations
Gideon P. Müller, Markus Hoffmann, Constantin Disselkamp +6
The \textit{Spirit} framework is designed for atomic scale spin simulations of magnetic systems of arbitrary geometry and magnetic structure, providing a graphical user interface w…
Drugst.One -- A plug-and-play solution for online systems medicine and network-based drug repurposing
Andreas Maier, Michael Hartung, Mark Abovsky +36
In recent decades, the development of new drugs has become increasingly expensive and inefficient, and the molecular mechanisms of most pharmaceuticals remain poorly understood. In…
Observation of hydrogen-induced Dzyaloshinskii-Moriya interaction and reversible switching of magnetic chirality
Gong Chen, MacCallum Robertson, Markus Hoffmann +8
The Dzyaloshinskii-Moriya interaction (DMI) has drawn great attention as it stabilizes magnetic chirality, with important implications in fundamental and applied research. This ant…
Systematic derivation of realistic spin-models for beyond-Heisenberg solids
Markus Hoffmann, Stefan Blügel
We present a systematic derivation of effective lattice spin Hamiltonians derived from a rotationally invariant multi-orbital Hubbard model including a term ensuring Hund's rule co…
Dynamics of magnetization at infinite temperature in a Heisenberg spin chain
Eliott Rosenberg, Trond Andersen, Rhine Samajdar +178
Understanding universal aspects of quantum dynamics is an unresolved problem in statistical mechanics. In particular, the spin dynamics of the 1D Heisenberg model were conjectured…
Noise-resilient Edge Modes on a Chain of Superconducting Qubits
Xiao Mi, Michael Sonner, Murphy Yuezhen Niu +125
Inherent symmetry of a quantum system may protect its otherwise fragile states. Leveraging such protection requires testing its robustness against uncontrolled environmental intera…
Suppressing quantum errors by scaling a surface code logical qubit
Rajeev Acharya, Igor Aleiner, Richard Allen +154
Practical quantum computing will require error rates that are well below what is achievable with physical qubits. Quantum error correction offers a path to algorithmically-relevant…
Readout of a quantum processor with high dynamic range Josephson parametric amplifiers
T. C. White, Alex Opremcak, George Sterling +91
We demonstrate a high dynamic range Josephson parametric amplifier (JPA) in which the active nonlinear element is implemented using an array of rf-SQUIDs. The device is matched to…
Material systems for FM-/AFM-coupled skyrmions in Co/Pt-based multilayers
Hongying Jia, Bernd Zimmermann, Markus Hoffmann +3
By means of systematic first-principles calculations based on density functional theory we search for suitable materials that can host antiferromagnetically coupled skyrmions. We c…
Atomistic perspective of long lifetimes of small skyrmions at room temperature
Markus Hoffmann, Gideon P. Müller, Stefan Blügel
The current development to employ magnetic skyrmions in novel spintronic device designs has led to a demand for room temperature-stable skyrmions of ever smaller size. We present e…
Magnetic domain walls of the van der Waals material FeGeTe
Hung-Hsiang Yang, Namrata Bansal, Philipp RüÃmann +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…
The AiiDA-Spirit plugin for automated spin-dynamics simulations and multi-scale modelling based on first-principles calculations
Philipp RüÃmann, Jordi Ribas Sobreviela, Moritz Sallermann +3
Landau-Lifshitz-Gilbert (LLG) spin-dynamics calculations based on the extended Heisenberg Hamiltonian is an important tool in computational materials science involving magnetic mat…
Distributed Acoustic Fiber Sensing for Research Campuses and Large Scientific Infrastructures -- The Hamburg WAVE proto-network
Oliver Bölt, Luigia Cristiano, Sandy Croatto +17
Here, we demonstrate and investigate how Distributed Acoustic Sensing (DAS) can be utilized on research campuses and in large scientific infrastructures to study environmental vibr…
Competition of Dzyaloshinskii-Moriya and higher-order exchange interactions in Rh/Fe atomic bilayers on Ir(111)
Niklas Romming, Henning Pralow, André Kubetzka +7
Using spin-polarized scanning tunneling microscopy and density functional theory we demonstrate the occurrence of a novel type of noncollinear spin structure in Rh/Fe atomic bilaye…
Antiskyrmions stabilized at interfaces by anisotropic Dzyaloshinskii-Moriya interaction
Markus Hoffmann, Bernd Zimmermann, Gideon P. Müller +4
Chiral magnets are an emerging class of topological matter harbouring localized and topologically protected vortex-like magnetic textures called skyrmions, which are currently unde…
Spanning Fermi arcs in a two-dimensional magnet
Ying-Jiun Chen, Jan-Philipp Hanke, Markus Hoffmann +5
The discovery of topological states of matter has led to a revolution in materials research. When external or intrinsic parameters break certain symmetries, global properties of to…
Formation of robust bound states of interacting microwave photons
Alexis Morvan, Trond I. Andersen, Xiao Mi +147
Systems of correlated particles appear in many fields of science and represent some of the most intractable puzzles in nature. The computational challenge in these systems arises w…
Topological-chiral magnetic interactions driven by emergent orbital magnetism
Sergii Grytsiuk, Jan-Philipp Hanke, Markus Hoffmann +6
Two hundred years ago, André-Marie Ampère discovered that electric loops in which currents of electrons are generated by a penetrating magnetic field can interact with each other…