金属电极和超导电极间量子点的Meservey-Tedrow-Fulde效应
Meservey-Tedrow-Fulde effect in a quantum dot embedded between metallic and superconducting electrodes
摘要：
施加到耦合在一个金属电极和一个超导电极之间的量子点的磁场可以产生与Meservey、Tedrow和Fulde [Phys. Rev. Lett. 25，1270（1970）]的平面正常金属超导结。我们研究了隧穿电流，发现在V = +/- Delta/e的带隙边缘附近，微分电导的平方根奇异性确实表现出塞曼分裂.由于磁场也影响量子点的隙内态，因此它进一步在异常（亚隙）Andreev电流上施加超精细结构，这对于近藤共振的签名具有至关重要的意义。
英文摘要：
Magnetic field applied to the quantum dot coupled between one metallic and one superconducting electrode can produce a similar effect as has been experimentally observed by Meservey, Tedrow and Fulde [Phys. Rev. Lett. 25, 1270 (1970)] for the planar normal metal -- superconductor junctions. We investigate the tunneling current and show that indeed the square root singularities of differential conductance exhibit the Zeeman splitting near the gap edge features V = +/- Delta/e. Since magnetic field affects also the in-gap states of quantum dot it furthermore imposes a hyperfine structure on the anomalous (subgap) Andreev current which has a crucial importance for a signature of the Kondo resonance.
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