论文标题
Majoraana耦合和围绕局部自旋筛选
Majorana coupling and Kondo screening of localized spins
论文作者
论文摘要
我们对量子点的局部磁矩的命运进行了理论分析，该量子点与正常的金属铅和拓扑超导线在末端托管主要模式。通过简单的分析工具和数值重新归一化组的计算，我们表明Majorana模式的接近度从$ 1/4 $（免费旋转$ 1/2 $）的特征降低到$ 1/16 $。然后与正常铅的耦合会导致近关系效应，从而使磁矩完全筛选在近托温度以下。后者大大增加了以与Majoraana模式的强耦合。
We perform a theoretical analysis of the fate of local magnetic moment of a quantum dot coupled to a normal metallic lead and a topological superconducting wire hosting Majorana modes at the ends. By means of simple analytical tools and numerical renormalization group calculations we show that the proximity of Majorana mode reduces the magnetic moment from $1/4$, characteristic of a free spin $1/2$, to $1/16$. The coupling to the normal lead then causes the Kondo effect, such that the magnetic moment is fully screened below the Kondo temperature. The latter is vastly increased for strong coupling to Majorana mode.
