论文标题
基于量子厅的Josephson连接
Nonequilibrium edge transport in quantum Hall based Josephson junctions
论文作者
论文摘要
我们研究了电压偏置的约瑟夫森连接的运输特性，其中BCS超导导线通过量子厅样品的边缘耦合。在这种情况下，约瑟夫森电流的平衡形成了，在floquet-keldysh green的功能形式主义中进行了数值研究。我们特别关注时间平均电流，这是偏置电压和样品螺纹螺纹的磁性磁通量的函数，并分析了谐振的多个Andreev反射过程，从而导致了准粒子透射的增强。我们发现，电压升华平面中直流电流的完整断层扫描允许对单向边缘模式进行完整的光谱，并可以用作这些混合设备中手性边缘介导的传输的标志。
We study the transport properties of a voltage-biased Josephson junction where the BCS superconducting leads are coupled via the edges of a quantum Hall sample. In this scenario, an out of equilibrium Josephson current develops, which is numerically studied within the Floquet-Keldysh Green's function formalism. We particularly focus on the time-averaged current as a function of both the bias voltage and the magnetic flux threading the sample and analyze the resonant multiple Andreev reflection processes that lead to an enhancement of the quasiparticle transmission. We find that a full tomography of the dc current in the voltage-flux plane allows for a complete spectroscopy of the one-way edge modes and could be used as a hallmark of chiral edge mediated transport in these hybrid devices.
