The Kondo effect in the T-shaped double-quantum-dot structure is theoretically investigated, by considering different adjustments of the quantum dot levels. It is shown that when the quantum dot levels are shifted to the electron–hole symmetry point, the two-stage Kondo effect can be induced at the limit of weak interdot coupling. However, with the increase of interdot coupling, the interdot antiferromagnetic correlation modifies the Kondo effect efficiently, leading to the destruction of the conductance plateau. If the dot levels are detuned, the low-temperature entropy transition will exhibit new results and complicated transport behaviors occur. The reason also arises from the competition between the Kondo effect and the interdot antiferromagnetic correlation. We believe that these results are helpful for the further understanding of the Kondo physics in the T-shaped double-dot structure.

近藤效应通过考虑量子点能级的不同调整，从理论上研究了 T 形双量子点结构中的 。结果表明，当量子点能级移动到电子-空穴对称点时，可以在弱点间耦合的极限处诱发两级近藤效应。然而，随着点间耦合的增加，点间反铁磁相关性有效地改变了近藤效应，导致电导平台的破坏。如果点能级失谐，低温熵跃迁将呈现出新的结果，并出现复杂的输运行为。原因也来自近藤效应和点间反铁磁相关之间的竞争。