Establishing the fundamental magnetic interactions in the chiral Skyrmionic Mott insulator Cu(2)OSeO(3) by terahertz electron spin resonance.
The recent discovery of Skyrmions in Cu(2)OSeO(3) has established a new platform to create and manipulate Skyrmionic spin textures. We use high-field electron spin resonance with a terahertz free-electron laser and pulsed magnetic fields up to 64 T to probe and quantify its microscopic spin-spin interactions. In addition to the previously observed long-wavelength Goldstone mode, this technique probes also the high-energy part of the excitation spectrum which is inaccessible by standard low-frequency electron spin resonance. 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.
Dresden High Magnetic Field Laboratory (HLD), Helmholtz-Zentrum Dresden-Rossendorf, Dresden D-01328, Germany.
M
M
Ozerov
Leibniz Institute for Solid State and Materials Research, IFW, Dresden D-01069, Germany.
J
J
Romhányi
Leibniz Institute for Solid State and Materials Research, IFW, Dresden D-01069, Germany.
M
M
Belesi
Institut de Physique de la Matiére Condensée, Ecole Polytechnique Fédérale de Lausanne, Station 3, CH-1015 Lausanne-EPFL, Switzerland.
H
H
Berger
Institut de Physique de la Matiére Condensée, Ecole Polytechnique Fédérale de Lausanne, Station 3, CH-1015 Lausanne-EPFL, Switzerland.
J-Ph
JP
Ansermet
Leibniz Institute for Solid State and Materials Research, IFW, Dresden D-01069, Germany and Department of Physics, TU Dresden, Dresden D-01062, Germany.
Jeroen
J
van den Brink
Dresden High Magnetic Field Laboratory (HLD), Helmholtz-Zentrum Dresden-Rossendorf, Dresden D-01328, Germany and Department of Physics, TU Dresden, Dresden D-01062, Germany.
J
J
Wosnitza
Dresden High Magnetic Field Laboratory (HLD), Helmholtz-Zentrum Dresden-Rossendorf, Dresden D-01328, Germany.
S A
SA
Zvyagin
Leibniz Institute for Solid State and Materials Research, IFW, Dresden D-01069, Germany.
I
I
Rousochatzakis