论文标题
相互作用引起的固体中电子光谱的扁平化引发的拓扑混乱
Topological disorder triggered by interaction-induced flattening of electron spectra in solids
论文作者
论文摘要
我们解决了类似古典行为的干预措施，这是对固体的强相关电子系统的实验研究，这些固体系统在温度下出现$ t $远低于Debye温度$ T_D $。我们将这种出乎意料的现象归因于常规Landau状态的自发重排，超出了该状态的拓扑稳定性分解的临界点，从而导致形成了与名义费米表面相互作用的相互作用诱导的平坦带。我们证明，除关键点之外，这种相关的费米系统的准粒子图片仍然存在，因为与费米能量$ t_f = p^2_f/2m_e $相比，单粒子激发的阻尼仍然很小。得出了一个Pitaevskii风格的方程式，用于确定重排的准粒子动量分布$ n _*（{\ bf p}）$，它适用于在实验中发现的电阻率$ρ（t）$的线性电阻率行为的说明。
We address the intervention of classical-like behavior, well documented in experimental studies of strongly correlated electron systems of solids that emerges at temperatures $T$ far below the Debye temperature $T_D$. We attribute this unexpected phenomenon to spontaneous rearrangement of the conventional Landau state beyond a critical point at which the topological stability of this state breaks down, leading to the formation of an interaction-induced flat band adjacent to the nominal Fermi surface. We demonstrate that beyond the critical point, the quasiparticle picture of such correlated Fermi systems still holds, since the damping of single-particle excitations remains small compared with the Fermi energy $T_F=p^2_F/2m_e$. A Pitaevskii-style equation for determination of the rearranged quasiparticle momentum distribution $n_*({\bf p})$ is derived, which applies to explanation of the linear-in-$T$ behavior of the resistivity $ρ(T)$ found experimentally.
