Transition to a Magnon Bose–Einstein Condensate

被引:0
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作者
P. E. Petrov
G. A. Knyazev
A. N. Kuzmichev
P. M. Vetoshko
V. I. Belotelov
Yu. M. Bunkov
机构
[1] Russian Quantum Center,
[2] Moscow State University,undefined
[3] Vernadsky Crimean Federal University,undefined
[4] Kotelnikov Institute of Radio Engineering and Electronics,undefined
[5] Russian Academy of Sciences,undefined
来源
JETP Letters | 2024年 / 119卷
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摘要
Parameters of the transition from classical dynamics of spin waves to the formation of a coherent magnon Bose–Einstein condensate have been obtained experimentally for the first time. The studies are performed on an yttrium iron garnet film beyond the radio frequency excitation region; thus, the coherent state of magnons is an eigenstate rather than a state induced by an external radio frequency field. The critical magnon density at the formation of the Bose–Einstein condensate is in good agreement with a theoretically predicted value. The transition is obtained at room temperature, which is possible owing to a small mass of magnons and their high density.
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页码:118 / 122
页数:4
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