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arXiv 2112.03310cond-mat.mes-hallcond-mat.quant-gas
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钇铁石榴石中磁弹性玻色子的积累:动力学理论和波矢分辨布里渊光散射

Accumulation of magnetoelastic bosons in yttrium iron garnet: kinetic theory and wave vector resolved Brillouin light scattering

Viktor Hahn, Pascal Frey, Alexander A. Serga, Vitaliy I. Vasyuchka, Burkard Hillebrands, Peter Kopietz, Andreas Rückriegel

摘要:

我们推导并求解了描述磁弹性玻色子在磁绝缘体钇铁石榴石薄膜中实现的过剩磁振子气体中积累的量子动力学方程。我们表明,在存在的磁振子凝聚,有一个非平衡的稳定状态,其中非相干磁弹性玻色子积累在一个狭窄的区域中的动量空间的能量略低于底部的磁振子谱。计算结果与钇铁石榴石中磁振子和磁弹玻色子稳态非平衡态的布里渊光散射测量结果符合得很好。

英文摘要:

We derive and solve quantum kinetic equations describing the accumulation of magnetoelastic bosons in an overpopulated magnon gas realized in a thin film of the magnetic insulator yttrium iron garnet. We show that in the presence of a magnon condensate, there is a non-equilibrium steady state in which incoherent magnetoelastic bosons accumulate in a narrow region in momentum space for energies slightly below the bottom of the magnon spectrum. The results of our calculations agree quite well with Brillouin light scattering measurements of the stationary non-equilibrium state of magnons and magnetoelastic bosons in yttrium iron garnet.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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