%T Magnon-photon coupling in the noncollinear magnetic insulator Cu2OSeO3
%A L Abdurakhimov
%A S Khan
%A NA Panjwani
%A D Breeze
%A M Mochizuki
%A S Seki
%A Y Tokura
%A JJL Morton
%A H Kurebayashi
%V 99
%N 14
%D 2019
%I AMER PHYSICAL SOC
%J Physical Review B
%L discovery10072598
%X Anticrossing behavior between magnons in the noncollinear chiral magnet Cu2OSeO3 and a two-mode X-band
microwave resonator was studied in the temperature range 5–100 K. In the field-induced ferrimagnetic phase,
we observed a strong-coupling regime between magnons and two microwave cavity modes with a cooperativity
reaching 3600. In the conical phase, cavity modes are dispersively coupled to a fundamental helimagnon mode,
and we demonstrate that the magnetic phase diagram of Cu2OSeO3 can be reconstructed from the measurements
of the cavity resonance frequency. In the helical phase, a hybridized state of a higher-order helimagnon mode
and a cavity mode—a helimagnon polariton—was found. Our results reveal a class of magnetic systems where
strong coupling of microwave photons to nontrivial spin textures can be observed.
%O This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions. / This work received funding from the European Union (EU)’s Horizon 2020 research and innovation programme H2020-ICT-2015 under grant agreement No 688539.