二维系统中库仑相互作用的地平面屏蔽：一个二维系统如何有效地屏蔽另一个二维系统中的相互作用？

二维电子系统中的光电流和光电压振荡：电势分布的屏蔽和“反屏蔽”

Photo-current and photo-voltage oscillations in the two-dimensional electron system: screening and "anti-screening" of a potential profile

我们观察到在最先进的GaAs基二维电子系统中，微波感应的光电流和光电压随外加磁场的变化而在零附近振荡。当微波频率接近回旋共振频率的倍数时，光信号通过零。它们源自由于例如接触处的带弯曲而产生的内置电场。振荡对应于光激发电子对这些场的抑制（屏蔽）或增强（“反屏蔽”）。

Observation of Dynamic Screening in the Excited Exciton States in Multi-layered MoS$_2$

Excitonic resonance and binding energies can be altered by controlling the environmental screening of the attractive Coulomb potential. Although this screening response is often assumed to be static, the time evolution of the excitonic quasiparticles manifests a frequency-dependence in its Coulomb screening efficacy. In this letter, we investigate a ground (1s) and first excited exciton state (2s) in a multi-layered transition metal dichalcogenide (MoS$_2$) upon ultrafast photo-excitation. We explore the dynamic screening effects on the latter and show its resonance frequency is the relevant f…

金属碳纳米管中的电荷屏蔽效应

Charge Screening Effect in Metallic Carbon Nanotubes

在一维长程库仑作用模型下研究了金属碳纳米管中的电荷屏蔽效应。它指出，外部电荷是固定的空间被屏蔽的内部电子，使所得的对象成为电中性。我们发现，屏蔽长度是由大约一个纳米管的直径。

Non-Fermi-liquid Kondo screening under Rabi driving

We investigate a Rabi-Kondo model describing an optically driven two-channel quantum dot device featuring a non-Fermi-liquid Kondo effect. Optically induced Rabi oscillation between the valence and conduction levels of the dot gives rise to a two-stage Kondo effect: Primary screening of the local spin is followed by secondary nonequilibrium screening of the local orbital degree of freedom. Using bosonization arguments and the numerical renormalization group, we compute the dot emission spectrum and residual entropy. Remarkably, both exhibit two-stage Kondo screening with non-Fermi-liquid prope…

Equilibrium Field Theory of Magnetic Monopoles in Degenerate Square Spin Ice: Correlations, Entropic Interactions, and Charge Screening Regimes

We describe degenerate square spin as an ensemble of magnetic monopoles coupled via an emergent entropic field that subsumes the effect of the underlying spin vacuum. We compute their effective free energy, entropic interaction, correlations, screening, and structure factors that coincide with the experimental ones. Unlike in pyrochlore ices, a dimensional mismatch between real and entropic interactions leads to weak singularities at the pinch points and algebraic correlations at long distance. This algebraic screening can be, however, camouflaged by a pseudo-screening regime.