论文标题
扁平带诱导多组分费米的非Fermi液体行为
Flat band induced non-Fermi liquid behavior of multicomponent fermions
论文作者
论文摘要
我们研究了平坦带中的多组分费物，并预测非Fermi液体行为的实验特征。我们使用动态均值场理论在$ \ Mathcal {n} = 2 $和$ \ Mathcal {n} = 4 $组件的Lieb晶格中获得密度，双占用和熵。我们得出了$ \ Mathcal {n} $的不同值的结果之间的平均范围缩放关系，并研究了由于超出均值磁场效应而导致的崩溃。预测的特征发生在高于Néel温度的温度下，并在存在谐波捕获电势的情况下持续存在，因此可以通过当前的超低气体实验观察到它们。
We investigate multicomponent fermions in a flat band and predict experimental signatures of non-Fermi liquid behavior. We use dynamical mean-field theory to obtain the density, double occupancy and entropy in a Lieb lattice for $\mathcal{N} = 2$ and $\mathcal{N} = 4$ components. We derive a mean-field scaling relation between the results for different values of $\mathcal{N}$, and study its breakdown due to beyond-mean field effects. The predicted signatures occur at temperatures above the Néel temperature and persist in presence of a harmonic trapping potential, thus they are observable with current ultracold gas experiments.
