标题： 关联电子格点极化子系统的赝隙能带结构的演化 显示英文标题

标题： Evolution of the pseudogap band structure in a system of electron-correlated lattice polarons

摘要： 晶格振动在强关联电子系统中赝隙态形成中的作用的演变已被研究，涉及电子-声子耦合参数和掺杂电荷载流子浓度的变化。 我们应用广义紧束缚方法的极化子版本来分析一个现实的多带二维模型的能带结构，该模型包含了霍尔斯坦型和皮尔斯型的电子-晶格贡献。 已经证明，极化子效应的出现始于谱函数强度的调制。 然而，在相图的特定区域内，电子能带结构和赝隙态会发生显著变化。 这是由于相干极化子激发在费米能级附近产生了部分平坦的能带。 这一过程导致费米面的拓扑结构发生变化，并在态密度中出现相应的特征。 显示英文摘要

摘要： The evolution of the role of lattice vibrations in the formation of the pseudogap state in strongly correlated electron systems has been investigated concerning changes in the electron-phonon coupling parameters and the concentration of doped charge carriers. We apply the polaronic version of the generalized tight-binding method to analyze the band structure of a realistic multiband two-dimensional model that incorporates the electron-lattice contributions of both Holstein and Peierls types. It has been demonstrated that the emergence of polaronic effects begins with the modulation of spectral function intensity. However, within a specific region of the phase diagram, a significant transformation of the electron band structure and pseudogap state occurs. It results from coherent polaron excitations that create a partially flat band near the Fermi level. This process leads to a change in the topology of the Fermi surface and the emergence of corresponding features in the density of states.