Tunable space-time crystal in room-temperature magnetodielectrics

  title={Tunable space-time crystal in room-temperature magnetodielectrics},
  author={Alexander J. E. Kreil and Halyna Yu. Musiienko-Shmarova and Dmytro A. Bozhko and Anna Pomyalov and Victor S L’vov and Sebastian Eggert and Alexander A. Serga and Burkard Hillebrands},
  journal={Physical Review B},
We report the experimental realization of a space-time crystal with tunable periodicity in time and space in the magnon Bose-Einstein Condensate (BEC), formed in a room-temperature Yttrium Iron Garnet (YIG) film by radio-frequency space-homogeneous magnetic field. The magnon BEC is prepared to have a well defined frequency and non-zero wavevector. We demonstrate how the crystalline "density" as well as the time and space textures of the resulting crystal may be tuned by varying the experimental… 

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