论文标题
多梁系统光谱中的洪德频段
Hund bands in spectra of multiorbital systems
论文作者
论文摘要
光谱实验通常用于表征强相关系统的行为。因此，对不同光谱特征的深入了解至关重要。在这里，我们表明，多型哈伯德模型的频谱显示出独特的Hund \ MS {bands}，这些{bands}仅通过hund耦合$ j_ \ mathrm {h} $给出的能量发生，与互动$ u $ $ $ $ $ $ $ $ $ $ $ $ $ $不同。我们专注于与铁硫酸铁梯子相关的模型计算的实验相关的单粒子和光谱。计算是通过密度 - 马trix重新归一化组和Lanczos方法进行的。通过考虑动态均值场理论中的通用多梁模型，可以验证含义的一般性。
Spectroscopy experiments are routinely used to characterize the behavior of strongly correlated systems. An in-depth understanding of the different spectral features is thus essential. Here, we show that the spectrum of the multiorbital Hubbard model exhibits unique Hund \ms{bands} that occur at energies given only by the Hund coupling $J_\mathrm{H}$, as distinct from the Hubbard satellites following the interaction $U$. We focus on experimentally relevant single-particle and optical spectra that we calculate for a model related to iron chalcogenide ladders. The calculations are performed via the density-matrix renormalization group and Lanczos methods. The generality of the implications is verified by considering a generic multiorbital model within dynamical mean-field theory.
