Publications de Henrik Moodysson Rønnow

Short-wave magnons with multipole spin precession detected in the topological bands of a skyrmion lattice

Henrik Moodysson Rønnow, Dirk Grundler, Arnaud Magrez, Ping Che, Priya Ranjan Baral, Thomas Schönenberger

Topological magnon bands enable uni-directional edge transport without backscattering, enhancing the robustness of magnonic circuits and providing a novel platform for exploring quantum transport phenomena. Magnetic skyrmion lattices, in particular, host a ...

Springer Science and Business Media LLC2025

FAIR data-the photon and neutron communities move together towards open science

Henrik Moodysson Rønnow

The topic of data storage, traceability, and data use and reuse in the years following experiments is becoming an important topic in Europe and across the world. Many scientific communities are striving to create open data by the FAIR principles. This is a ...

2025

High‐Entropy Magnetism of Murunskite

Henrik Moodysson Rønnow, Ivica Zivkovic, Thomas La Grange, Davor Tolj, Rongrong Cai

Murunskite (K 2 FeCu 3 S 4 ) bridges the two known families of high‐temperature superconductors, cuprates and iron‐pnictides, structurally and electronically. Like these families, murunskite exhibits an antiferromagnetic (AF)‐like response with an ordered ...

Wiley2025

BIFROST—An indirect geometry cold neutron spectrometer at the European Spallation Source

Henrik Moodysson Rønnow, Paola Caterina Forino

We present the detailed design and performance simulations of BIFROST, a multiplexing indirect neutron time-of-flight spectrometer at the European Spallation Source. The instrument allows a neutron bandwidth of Δλ = 1.74 Å to reach the sample. The polychro ...

2025

Bound states and deconfined spinons in the dynamical structure factor of the J1-J2 spin-1 chain

Henrik Moodysson Rønnow, Frédéric Mila, Mithilesh Nayak

Using a time-dependent density matrix renormalization group approach, we study the dynamical structure factor of the J1-J2 spin-1 chain. As J2 increases, the magnon mode develops incommensurability. The system undergoes a first-order transition at J2=0.76J ...

2025

Confined and Deconfined Spinon Excitations in the Rectangular-lattice Quantum Antiferromagnet

Henrik Moodysson Rønnow, Bruce Normand, Ellen Fogh, Noore Elahi Shaik

Fractionalization remains one of the most fascinating manifestations of strong interactions in quantum many-body systems. In quantum magnetism, the existence of spinons-collective magnetic excitations that behave as quasiparticles with fractional quantum n ...

AMER PHYSICAL SOC2025

Rendering the European neutron research landscape

Henrik Moodysson Rønnow

Neutrons, owing to their unique properties, serve as indispensable probes for investigating the structure and dynamics of materials across various length scales. The scientific community utilizing neutron research infrastructures encompasses a diverse rang ...

NATURE PORTFOLIO2025

Dynamic competition between Cooper pair and spin density wave condensation

Henrik Moodysson Rønnow

Quantum matter phases may coexist microscopically even when they display competing tendencies. A fundamental question is whether such a competition can be avoided through the elimination of one phase while the other one condenses into the ground state. Her ...

American Physical Society (APS)2025

Bullet pressure-cell design for neutron scattering experiments with horizontal magnetic fields and dilution temperatures

Henrik Moodysson Rønnow, Richard Gaal, Luc Testa, Ellen Fogh, Gaétan Charles Antoine Giriat, Jana Pásztorová

The simultaneous application of high magnetic fields and high pressures for controlling magnetic ground states is important for testing our understanding of many-body quantum theory. However, the implementation for neutron scattering experiments presents a ...

2025

Electronic structure of Bi2 Ir2 O7 probed by resonant inelastic x-ray scattering at the oxygen K edge: Metallicity, hybridization, and electronic correlations

Henrik Moodysson Rønnow

The electronic structure of metallic Bi2Ir2O7 has been investigated by a combination of soft x-ray absorption spectroscopy, x-ray emission spectroscopy (XES), and resonant inelastic x-ray scattering (RIXS) in the vicinity of the oxygen K edge. The O K-edge ...

2025