Tunable Planar Josephson Junctions Driven by Time-Dependent Spin-Orbit Coupling
Tunable Planar Josephson Junctions Driven by Time-Dependent Spin-Orbit Coupling
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DOI：
10.1103/physrevapplied.18.l031001
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发表时间：
2022-08
影响因子：
4.6
通讯作者：
D. Monroe;M. Alidoust;I. Žutić
中科院分区：
文献类型：
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作者：
D. Monroe;M. Alidoust;I. Žutić
将常规超导体与常见的III-V族半导体集成提供了一个多功能平台来实现可调谐约瑟夫森结（JJ）及其应用。我们建议，与栅极控制的时间相关的自旋轨道耦合，它是可能的强烈修改的电流相位关系和约瑟夫森能量，并提供一种机制来驱动的JJ动态，即使在没有任何偏置电流。我们表明，稳定的相位之间的过渡实现了一个简单的线性变化的自旋轨道耦合的强度，而过渡率可以超过门诱导电场GHz的变化一个数量级。由此产生的恒定有效磁场和不断变化的自旋轨道耦合之间的相互作用对超导自旋电子学，控制马约拉纳束缚态和新兴量子比特有直接影响。我们认为，拓扑超导性，寻求容错量子计算，超导电子学和自旋电子学提供了更简单的应用。
Integrating conventional superconductors with common III-V semiconductors provides a versatile platform to implement tunable Josephson junctions (JJs) and their applications. We propose that with gate-controlled time-dependent spin-orbit coupling, it is possible to strongly modify the current-phase relations and Josephson energy and provide a mechanism to drive the JJ dynamics, even in the absence of any bias current. We show that the transition between stable phases is realized with a simple linear change in the strength of the spin-orbit coupling, while the transition rate can exceed the gate-induced electric field GHz changes by an order of magnitude. The resulting interplay between the constant effective magnetic field and changing spin-orbit coupling has direct implications for superconducting spintronics, controlling Majorana bound states, and emerging qubits. We argue that topological superconductivity, sought for fault-tolerant quantum computing, offers simpler applications in superconducting electronics and spintronics.