Direct observation of the transition from spin waves to the magnon Bose condensate
G. A. Knyazev,
A. N. Kuzmichev,
P. E. Petrov
et al.
Abstract:Bose-Einstein condensation occurs at an appropriate density of bosonic particles, depending on their mass and temperature. The transition from the semiclassical paradigm of spin waves to the magnon Bose-Einstein condensed state (mBEC) was obtained experimentally with increasing magnon density. We used the Faraday rotation effect to study the spatial distribution of the magnon density and phase far from their excitation region. A coherent magnetization precession was observed throughout the sample, which indica… Show more
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