Speaker
Dr
Mykhaylo Ozerov
(Dresden High Magnetic Field Laboratory (HLD), Helmholtz-Zentrum Dresden-Rossendorf, D-01328, Germany)
Description
The recent discovery of skyrmions in Cu2OSeO3 has established a new platform to create and manipulate skyrmionic spin textures. We use high-field electron spin resonance (ESR) spectroscopy combining a terahertz free electron laser and pulsed magnetic fields up to 64 T to probe and quantify its microscopic spin-spin interactions. Besides providing direct access to the long-wavelength Goldstone mode, this technique probes also the high-energy part of the excitation spectrum which is inaccessible by standard low-frequency ESR. Fitting the behavior of the observed modes in magnetic field to a theoretical framework establishes experimentally that the fundamental magnetic building blocks of this skyrmionic magnet are rigid, highly entangled and weakly coupled tetrahedra.
Primary author
Dr
Mykhaylo Ozerov
(Dresden High Magnetic Field Laboratory (HLD), Helmholtz-Zentrum Dresden-Rossendorf, D-01328, Germany)
Co-authors
Dr
Helmut Berger
(Institut de Physique de la Matiére Condensée, Ecole Polytechnique Fédérale de Lausanne, Station 3, CH-1015 Lausanne-EPFL, Switzerland)
Dr
Ioannis Rousochatzakis
(Leibniz Institute for Solid State and Materials Research, IFW Dresden, D-01069, Germany)
Prof.
Jean-Philippe Ansermet
(Institut de Physique de la Matiére Condensée, Ecole Polytechnique Fédérale de Lausanne, Station 3, CH-1015 Lausanne-EPFL, Switzerland)
Prof.
Jeroen van den Brink
(Leibniz Institute for Solid State and Materials Research, IFW Dresden, D-01069, Germany)
Prof.
Joachim Wosnitza
(Dresden High Magnetic Field Laboratory (HLD), Helmholtz-Zentrum Dresden-Rossendorf, D-01328, Germany)
Mrs
Judit Romhányi
(Leibniz Institute for Solid State and Materials Research, IFW Dresden, D-01069, Germany)
Dr
Maria Belesi
(Leibniz Institute for Solid State and Materials Research, IFW Dresden, D-01069, Germany)
Dr
Sergei Zvyagin
(Dresden High Magnetic Field Laboratory (HLD), Helmholtz-Zentrum Dresden-Rossendorf, D-01328, Germany)
