Real-time simulations of nonequilibrium transport in the single-impurity Anderson model
Real-time simulations of nonequilibrium transport in the single-impurity Anderson model
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DOI：
10.1103/physrevb.79.235336
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发表时间：
2009-06-01
影响因子：
3.7
通讯作者：
Dagotto, E.
中科院分区：
文献类型：
--
作者：
Heidrich-Meisner, F.;Feiguin, A. E.;Dagotto, E.
在强相互作用纳米结构中的输运领域中的主要开放问题之一是对超出线性响应范围的电流的理解。在这项工作中，我们考虑单杂质安德森模型，并使用自适应含时密度矩阵重整化群方法来计算实时的非平衡电流。我们首先集中在粒子-空穴对称点，近藤关联是最强的，然后扩展到混合价制度的非平衡输运的研究。作为主要结果，我们提出了准确的数据，该模型的电流-电压特性。
One of the main open problems in the field of transport in strongly interacting nanostructures is the understanding of currents beyond the linear response regime. In this work, we consider the single-impurity Anderson model and use the adaptive time-dependent density matrix renormalization group method to compute real-time currents out of equilibrium. We first focus on the particle-hole symmetric point where Kondo correlations are the strongest and then extend the study of the nonequilibrium transport to the mixed-valence regime. As a main result, we present accurate data for the current-voltage characteristics of this model.