近日，意大利比萨大学Marco Polini团队实现了用极化腔调谐费米液体。2025年8月7日出版的《美国科学院刊》杂志发表了这项成果。

无源亚波长空腔能否改变量子材料的性质是目前人们关注的热点问题。

研究组证明了二维金属的费米液体参数被空腔极化子模式所改变，并且这些变化可以通过测量弱垂直磁场中的聚合磁输运现象——舒布尼科夫-德哈斯振荡来监测。这种效果是内在的，与无序完全无关。

作为一个说明性的例子，研究组对石墨烯在由天然双曲晶体和金属栅极形成的平面范德华腔中的准粒子速度进行了显式计算。当前者的声子极化子模式与石墨烯等离子体激元能量匹配时，腔的最大影响发生。对于典型的石墨烯载流子密度，这种情况发生在太赫兹光谱范围内。

附：英文原文

Title: Tuning Fermi liquids with polaritonic cavities

Author: Riolo, Riccardo, Tomadin, Andrea, Mazza, Giacomo, Asgari, Reza, MacDonald, Allan H., Polini, Marco

Issue&Volume: 2025-8-7

Abstract: The question of whether or not passive subwavelength cavities can alter the properties of quantum materials is currently attracting a great deal of attention. In this article, we show that the Fermi liquid parameters of a two-dimensional metal are modified by cavity polariton modes, and that these changes can be monitored by measuring a paradigmatic magneto-transport phenomenon, Shubnikov–de Haas oscillations in a weak perpendicular magnetic field. This effect is intrinsic, and totally unrelated to disorder. As an illustrative example, we carry out explicit calculations of the quasiparticle velocity of graphene in a planar van der Waals cavity formed by natural hyperbolic crystals and metal gates. The largest effects of the cavity occur when the phonon polariton modes of the former match energetically the graphene plasmon. For typical graphene carrier densities this occurs in the Terahertz spectral range.

DOI: 10.1073/pnas.2407995122

Source: https://www.pnas.org/doi/abs/10.1073/pnas.2407995122