剪切应力在强相互作用金属费米液体中的传播增强了太赫兹辐射的透射
Propagation of shear stress in strongly interacting metallic Fermi liquids enhances transmission of terahertz radiation
摘要：
在中性$^3$ He中，费米液体现象学的一个亮点是观察到，在无碰撞状态下，剪切应力的传播就像处理固体的横向声子一样。这种$"$横向零声$"$的存在要求准粒子质量增强超过一个临界值。这种传播的剪切应力是否也存在于强关联电子系统中？尽管与伽利略连续统中的中性情况有一些明显的差异，但我们得出结论，横零声应该是通用的。我们提出了一个实验装置，应该在这方面是非常敏感的：太赫兹辐射通过一个薄板的重费米子材料的传输将在低温下强烈增强，并伴随着巨大的振荡，这反映了光本身和$"$材料光子之间的干涉$"$是在带电的费米液体中的横向零声的实际表现。
英文摘要：
A highlight of Fermi-liquid phenomenology, as explored in neutral $^3$He, is the observation that in the collisionless regime shear stress propagates as if one is dealing with the transverse phonon of a solid. The existence of this $"$transverse zero sound$"$ requires that the quasiparticle mass enhancement exceeds a critical value. Could such a propagating shear stress also exist in strongly correlated electron systems? Despite some noticeable differences with the neutral case in the Galilean continuum, we arrive at the verdict that transverse zero sound should be generic. We present an experimental setup that should be exquisitely sensitive in this regard: the transmission of terahertz radiation through a thin slab of heavy-fermion material will be strongly enhanced at low temperature and accompanied by giant oscillations, which reflect the interference between light itself and the $"$material photon$"$ being the actual manifestation of transverse zero sound in the charged Fermi liquid.
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