Combined effect of Zeeman splitting and spin-orbit interaction on the Josephson current in a superconductor-two-dimensional electron gas-superconductor structure
Combined effect of Zeeman splitting and spin-orbit interaction on the Josephson current in a superconductor-two-dimensional electron gas-superconductor structure
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DOI：
10.1103/physrevb.66.052508
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发表时间：
2002-08-01
影响因子：
3.7
通讯作者：
Wyder, P
中科院分区：
文献类型：
--
作者：
Bezuglyi, EV;Rozhavsky, AS;Wyder, P
我们分析了超导体-二维电子气-超导体（S-2DEG-S）器件载流态的自旋效应，该器件的核在2DEG区自旋极化。由有效磁场B描述的二维电子与核自旋的超精细相互作用产生了Andreev能级的塞曼分裂，而没有轨道效应，这导致了B上超导振荡的干涉图案。二维电子气中的自旋-轨道效应导致约瑟夫森电流对B方向的强烈各向异性依赖，这可以作为自旋-轨道相互作用强度的探针。在一定条件下，该系统揭示了π结的性质。
We analyze spin effects in the current-carrying state of a superconductor-two-dimensional-electron gas-superconductor (S-2DEG-S) device with spin-polarized nuclei in the 2DEG region. The hyperfine interaction of 2D electrons with nuclear spins, described by the effective magnetic field B, produces Zeeman splitting of Andreev levels without orbital effects, which leads to an interference pattern of supercurrent oscillations over B. The spin-orbit effects in 2DEG cause a strongly anisotropic dependence of the Josephson current on the direction of B, which may be used as a probe for the spin-orbit interaction intensity. Under certain conditions, the system reveals the properties of pi junctions.