标题： 反铁磁极化子 显示英文标题

标题： Altermagnetic polarons

摘要： 尽管自旋相关的能带劈裂是altermagnets的特征之一，但传统的能带图本身在许多作为关联Mott材料的altermagnets中就失效了。 我们采用两种数值多体方法——自洽Born近似和变分聚簇方法——来探索这一强关联区域，并研究Mott altermagnets中的空穴运动。 我们的结果显示，自旋依赖的谱权重转移是Mott altermagnetism的主要特征。 这种明显的准粒子谱权重的自旋-动量锁定源于交替磁极化子的形成，其动力学由自由空穴运动与空穴与altermagnet中磁振子激发耦合之间的相互作用决定。 我们通过计算两个典型的交替磁系统（checkerboard $J$-$J'$模型和基于立方钒酸盐$R$VO$_3$的Kugel-Khomskii自旋轨道交替磁体，$R$=La, Pr, Nd, Y）的ARPES光谱来证明这一效应。 显示英文摘要

摘要： While a spin-dependent band splitting is one of the characteristic features of altermagnets, the conventional band picture itself breaks down in the many altermagnets that are correlated Mott materials. We employ two numerical many-body methods, the self-consistent Born approximation and variational cluster approach, to explore this strongly correlated regime and investigate hole motion in Mott altermagnets. Our results reveal that spin-dependent spectral-weight transfer is the dominant signature of Mott altermagnetism. This pronounced spin-momentum locking of the quasiparticle spectral weight arises from the formation of altermagnetic polarons, whose dynamics are governed by the interplay between free hole motion and the coupling of the hole to magnon excitations in the altermagnet. We demonstrate this effect by calculating ARPES spectra for two canonical altermagnetic systems: the checkerboard $J$-$J'$ model and the Kugel-Khomskii spin-orbital altermagnet based on cubic vanadates $R$VO$_3$ ($R$=La, Pr, Nd, Y).