论文标题
掺杂的两轨Kanamori-Hubbard模型中的新型子带
Novel subbands in the doped two-orbital Kanamori-Hubbard model
论文作者
论文摘要
我们用前所未有的细节来计算和解析状态的局部密度（DOS）和动量依赖的光谱函数在零温度下的零温度之一，这是一个密切相关的电子材料的关键模型之一，即通过高度优化的动力学理论，该模型使用高度优化的动态理论，该模型使用高度优化的动力学理论，该模型使用了一个高度优化的肾脏肾脏肾脏肾脏态度的固定剂。当系统被掺杂时，并且在存在有限的核库仑相互作用的情况下，我们发现了新型的Holon-Doublon In间隙子带的出现，该子带被Hund的耦合分开。我们还观察到了DOS中的新有趣特征，例如将下Hubbard带分成一致的狭窄，狭窄地分散了费米能量周围的峰，而另一个随着化学电位演变而来的子带。我们通过计算特定投影运算符的响应函数并与原子限制中的能量进行比较，从而获得了极好的一致性，从而表征了每个子带的主要转变。这项工作中发现的光谱函数的详细结果铺平了精确研究相关材料中的微观量子行为的方式。
We calculate and resolve with unprecedented detail the local density of states (DOS) and momentum-dependent spectral functions at zero temperature of one of the key models for strongly correlated electron materials, the degenerate two-orbital Kanamori-Hubbard model, by means of a highly optimized Dynamical Mean Field Theory which uses the Density Matrix Renormalization Group as the impurity solver. When the system is hole doped, and in the presence of a finite interorbital Coulomb interaction we find the emergence of a novel holon-doublon in-gap subband which is split by the Hund's coupling. We also observe new interesting features in the DOS like the splitting of the lower Hubbard band into a coherent narrowly dispersing peak around the Fermi energy, and another subband which evolves with the chemical potential. We characterize the main transitions giving rise to each subband by calculating the response functions of specific projected operators and comparing with the energies in the atomic limit, obtaining excellent agreement. The detailed results for the spectral functions found in this work pave the way to study with great precision the microscopic quantum behavior in correlated materials.
