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arXiv 2404.04440cond-mat.quant-gascond-mat.str-el
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二维玻色-玻色混合物中的磁旋子(Magnetoroton)

Magnetoroton in a two-dimensional Bose-Bose mixture

O. I. Utesov, S. V. Andreev

AI总结:

该研究将双组分玻色-爱因斯坦凝聚体慢磁振子理论推广到二维,分析不同相互作用区域的磁振子支极化子修正,揭示$p$波共振吸引可形成磁旋子,提出了对应基态候选结构与二维半导体激子的实现方案。

摘要:

我们将双组分玻色-爱因斯坦凝聚体中慢磁振子的理论推广到二维(2D)空间情形。针对弱相互作用与强相互作用两种区域,我们详细讨论了元激发谱磁振子支的极化子修正。在稀薄系统中,强相互作用区域可通过调节种间吸引力实现,从而在$p$波散射通道中获得共振。共振增强的$p$波吸引力会导致磁振子自局域化,并形成磁旋子(magnetoroton)。磁旋子不稳定性之外的基态性质仍有待探索,我们提出一种交替极化的稀薄$p$波晶体作为可能的候选结构。与三维(3D)情形不同,此处$s$波通道中所需的吸引势强度对应紧束缚区域,我们还提出了利用二维半导体中的激子实现本模型的一种潜在方案。

英文摘要:

We extend our theory of slow magnons in a two-component Bose-Einstein condensate to the case of two spatial dimensions (2D). We provide a detailed discussion of polaronic corrections to the magnon branch of the elementary excitation spectrum in a weakly- and strongly-interacting regimes. In a dilute system, the latter may be achieved by adjusting inter-species attraction such as to obtain a resonance in the $p$-wave scattering channel. Resonantly enhanced $p$-wave attraction results in the self-localization of magnons and formation of a magnetoroton. The nature of a ground state beyond the magnetoroton instability remains to be explored. We suggest a dilute p-wave crystal of alternating polarization as a possible candidate. In contrast to three dimensions (3D), the required strength of the attractive potential in the $s$-wave channel here corresponds to tight binding, and we suggest a potential realization of our model with excitons in 2D semiconductors.

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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