用声子极化激元和磁振子探测轴子暗物质
Detectability of Axion Dark Matter with Phonon Polaritons and Magnons
摘要：
凝聚态系统中的集体激发，如声子和磁振子，最近被提出作为光暗物质的新的检测通道。我们表明，激发i）光学声子极化激元极性材料中的${\mathcal O}$（1 T）磁场（通过轴子-光子耦合），和ii）磁有序材料中的带隙磁振子（通过轴子风耦合到电子自旋），可以覆盖难以达到的${\mathcal O}$（1-100）meV质量窗口QCD轴子暗物质与不到1千克-年的曝光。找到大量的光学声子或磁振子模式，可以耦合到轴子场的材料是至关重要的，建议一个程序来寻找一系列的材料具有不同的共振能量和激发选择规则，我们概述了规则，并讨论了一些候选目标，留下一个更详尽的搜索未来的工作。单光子、声子和磁振子探测器的不断发展将为实验实现这里提出的想法提供关键。
英文摘要：
Collective excitations in condensed matter systems, such as phonons and magnons, have recently been proposed as novel detection channels for light dark matter. We show that excitation of i) optical phonon polaritons in polar materials in an ${\mathcal O}$(1 T) magnetic field (via the axion-photon coupling), and ii) gapped magnons in magnetically ordered materials (via the axion wind coupling to the electron spin), can cover the difficult-to-reach ${\mathcal O}$(1-100) meV mass window of QCD axion dark matter with less than a kilogram-year exposure. Finding materials with a large number of optical phonon or magnon modes that can couple to the axion field is crucial, suggesting a program to search for a range of materials with different resonant energies and excitation selection rules; we outline the rules and discuss a few candidate targets, leaving a more exhaustive search for future work. Ongoing development of single photon, phonon and magnon detectors will provide the key for experimentally realizing the ideas presented here.
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