Department of Physics, Stanford University, California 94305, USA.
Phys Rev Lett. 2012 Aug 3;109(5):056803. doi: 10.1103/PhysRevLett.109.056803. Epub 2012 Jul 30.
We report on transport properties of Josephson junctions in hybrid superconducting-topological insulator devices, which show two striking departures from the common Josephson junction behavior: a characteristic energy that scales inversely with the width of the junction, and a low characteristic magnetic field for suppressing supercurrent. To explain these effects, we propose a phenomenological model which expands on the existing theory for topological insulator Josephson junctions.
我们报告了混合超导-拓扑绝缘体器件中约瑟夫森结的输运性质，这些性质与常见的约瑟夫森结行为有两个显著的不同之处：一个特征能量与结的宽度成反比，另一个是抑制超导电流的低特征磁场。为了解释这些效应，我们提出了一个唯象模型，该模型扩展了拓扑绝缘体约瑟夫森结的现有理论。
