论文标题
通过srvo $ _3 $单层旋转和轨道波动促进的颗粒孔不对称寿命
Particle-hole asymmetric lifetimes promoted by spin and orbital fluctuations in SrVO$_3$ monolayers
论文作者
论文摘要
工程过渡金属超薄氧化物膜的二维性质为尚未完全理解的物理学提供了一个较大的操场。在这里，我们研究了原始的Srvo $ _3 $单层，这些单层最近被预测显示了各种磁性和轨道订单。最重要的是，我们发现相关的非本地波动会导致自能力的动量分化，尤其是散射率。在一条2D哈伯德模型中，已知Fermi表面上的动量选择性（“ $ k = k_f $”）导致伪造物理学。相反，在多轨的情况下，我们证明了费米表面的占领（“ $ k <k_f $”）和无人机的一侧（“ $ k> k_f $”）之间的差异。我们的工作基于动力学顶点近似，可以补充对非本地波动的光谱特征的理解，它呼吁（重新）检查其他超薄氧化物膜和与动态均值场理论之外的方法，并且可能指向相关增强热电学效应的方法。
The two-dimensional nature of engineered transition-metal ultra-thin oxide films offers a large playground of yet to be fully understood physics. Here, we study pristine SrVO$_3$ monolayers that have recently been predicted to display a variety of magnetic and orbital orders. Above all ordering temperatures, we find that the associated non-local fluctuations lead to a momentum differentiation in the self-energy, particularly in the scattering rate. In the one-band 2D Hubbard model, momentum-selectivity on the Fermi surface ("$k=k_F$") is known to lead to pseudogap physics. Here instead, in the multi-orbital case, we evidence a differentiation between momenta on the occupied ("$k<k_F$") and the unoccupied side ("$k>k_F$") of the Fermi surface. Our work, based on the dynamical vertex approximation, complements the understanding of spectral signatures of non-local fluctuations, calls to (re)examine other ultra-thin oxide films and interfaces with methods beyond dynamical mean-field theory, and may point to correlation-enhanced thermoelectric effects.
