固体中相互作用诱导电子谱平坦化引发的拓扑无序
Topological disorder triggered by interaction-induced flattening of electron spectra in solids
摘要：
我们解决的干预经典的行为，有据可查的实验研究中出现的温度$T$远低于德拜温度$T_D$的强关联电子系统的固体。我们将这种意想不到的现象归因于传统朗道态的自发重排超过了临界点，在该临界点处，这种状态的拓扑稳定性被破坏，导致在标称费米表面附近形成相互作用诱导的平坦带。我们证明，超过临界点，准粒子图片的相关费米系统仍然成立，因为阻尼的单粒子激发仍然很小相比，费米能量$T_F=p^2_F/2m_e$。导出了确定重排准粒子动量分布$n_*({\bf p})$的Pitaevskii式方程，该方程适用于解释实验发现的电阻率$ρ(T)$的线性$T$行为。
英文摘要：
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.
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