Publication
Skyrmion Control and Phase Transitions in Cu2OSeO3
Publications associées (91)
Imaging the Ultrafast Coherent Control of a Skyrmion Crystal
Henrik Moodysson Rønnow, Dirk Grundler, Arnaud Magrez, Fabrizio Carbone, Ping Che, Alexey Sapozhnik, Priya Ranjan Baral, Ivan Madan, Simone Gargiulo, Thomas Schönenberger
Exotic magnetic textures emerging from the subtle interplay between thermodynamic and topological fluctuation have attracted intense interest due to their potential applications in spintronic devices. Recent advances in electron microscopy enable the imagi ...
2022From SU(2)5 to SU(2)3 Wess-Zumino-Witten transitions in a frustrated spin-52 chain
Frédéric Mila, Natalia Chepiga
We investigate the properties of a frustrated spin-5/2 chain with next-nearest-neighbor two- and three-site interactions, with two questions in mind: the nature of the transition into the dimerized phase induced by the three-site interaction, and the possi ...
AMER PHYSICAL SOC2022Unified analysis of topological defects in 2D systems of active and passive disks
Ignacio Pagonabarraga Mora, Pasquale Digregorio
We provide a comprehensive quantitative analysis of localized and extended topological defects in the steady state of 2D passive and active repulsive Brownian disk systems. We show that, both in and out-of-equilibrium, the passage from the solid to the hex ...
ROYAL SOC CHEMISTRY2021Helimagnons and Skyrmion Dynamics in Cu2OSeO3 and Fe/Gd Multilayers Explored by Brillouin Light Scattering and X-ray Microscopy
Spin dynamics in skyrmion hosting materials provide novel functionality in magnonics because of the formation of a novel magnon band structure and the nanoscale sizes of magnetic skyrmions. In this thesis, we explore the spin dynamics in the chiral magnet ...
EPFL2021Focusing on the liquid role in the vapour liquid solid growth mechanism
In this work we dive into key questions regarding the wetting of a nanoscale droplet which
provides fundamental understanding of Vapor-Liquid-Solid growth mode of nanowires. This
understanding is important to performreproducible NW fabrication and allow th ...
EPFL2021Motile dislocations knead odd crystals into whorls
Sofia Magkiriadou, Alexis Poncet
The competition between thermal fluctuations and potential forces governs the stability of matter in equilibrium, in particular the proliferation and annihilation of topological defects. However, driving matter out of equilibrium allows for a new class of ...
NATURE PORTFOLIO2021Melting of a skyrmion lattice to a skyrmion liquid via a hexatic phase
Henrik Moodysson Rønnow, Arnaud Magrez, Marco Cantoni, Fabrizio Carbone, Ping Huang, Thomas Schönenberger
While in 3D materials melting is a single, first-order phase transition, in 2D systems, it can also proceed via an intermediate phase. For a skyrmion lattice in Cu2OSeO3, magnetic field variations can tune this quasiparticle 2D solid into a skyrmion liquid ...
NATURE PUBLISHING GROUP2020Influence of Minor Cr Additions on Crystal Growth in Rapidly Solidified Al-20Zn Alloys
It has been discovered quite recently that Icosahedral Short-Range Order (ISRO) of atoms in the liquid phase of metallic alloys surrounding some trace elements added to the melt can influence both the nucleation and growth of the primary phase. In this wor ...
2020Out-of-equilibrium phase diagram of long-range superconductors
Within the ultimate goal of classifying universality in quantum many-body dynamics, understanding the relation between out-of-equilibrium and equilibrium criticality is a crucial objective. Models with power-law interactions exhibit rich well-understood cr ...
2020Photoemission from non-polar aromatic molecules in the gas and liquid phase
Majed Chergui, Frank van Mourik, Christopher Alexander Arrell, Lars-Hendrik Mewes, José Javier Pancracio Ojeda Andara, Jakob Grilj, Luca Longetti
The photoelectron spectra of both liquid and gas phase aromatic molecules are reported. The spectra were obtained using a 34.1 eV source produced by high harmonic generation and analysed with the help of high-level ab initio simulations using the reflectio ...
ROYAL SOC CHEMISTRY2020