The Kondo model (sometimes referred to as the s-d model) is a model for a single localized quantum impurity coupled to a large reservoir of delocalized and noninteracting electrons. The quantum impurity is represented by a spin-1/2 particle, and is coupled to a continuous band of noninteracting electrons by an antiferromagnetic exchange ...

因此, Kondo效应, 或者更一般的说, Kondo物理, 指的就是 多电子体系 在稀磁合金中出现的磁性杂质-非磁性宿主金属之间的对抗; 而在零温的费米面附近, 这一对抗导致的结果是强关联的. 这篇notes旨在总结学习最基本Kondo问题的一些要点, 主要参考用书是Phillips的Chapter7 ...

所谓Kodo effect是日本科学家近藤淳老先生在解释低温下磁性杂质原子掺杂正常金属带来的电阻极小值这种奇异行为所做的工作。 这里，我仅仅唯象地，以自己的认识简述一下Kondo问题的基本物理模型（个人相比于冗杂的…

The SIAM and the Kondo model belong to the class of quantum impurity models (QIM) which are defined by a finite number of local degrees of freedom, which are coupled to one or more bath continua.

The Kondo model perturbation method scattering of conduction electrons from a localized magnetic impurity † Hˆ K = Hˆ l + ￿ kk￿ J ￿ Sz ￿ α sk↑ α sk￿↑ − α † sk↓ α sk￿↓ ￿ + S+α† sk↓ α sk￿↑ + S −α† sk↑ α sk￿↓ ￿ Hˆ K = Hˆ l + Hˆ ￿ Hˆ ￿ =2J Sˆ · sˆ 0

In this lecture, we review the experimental situation of heavy Fermions with emphasis on the existence of a quantum phase transition (QPT) and related non-Fermi liquid (NFL) effects. We overview the Kondo lattice model (KLM) which is believed to …

2023年12月12日 · Our study paves the way for a quantitative understanding of metallic quantum states such as unconventional superconductivity. The Kondo lattice model has been key in qualitatively demonstrating...

2023年11月9日 · The Kondo model has proved to be an essential framework for the understanding and engineering of unconventional behaviors that develop in strongly correlated systems 1,2,3,4.

2025年2月11日 · The inter-channel hybridization plays the role of the most relevant operator at this fixed point having anomalous dimensions (N-1)/(2N+2). The critical point universal properties are relevant to many strong correlation problems, such as impurity placed in a Majorana metal and the multichannel Kondo lattice model of heavy fermion materials.

2025年3月14日 · The Kondo lattice model—and its strongly-coupled Anderson lattice counterpart—contain two types of degrees of freedom: a lattice of local moments and a band of conduction electrons (see Methods).