Anisotropic Pauli Spin-Blockade Effect and Spin–Orbit Interaction Field in an InAs Nanowire Double Quantum Dot,Nano Letters

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Anisotropic Pauli Spin-Blockade Effect and Spin–Orbit Interaction Field in an InAs Nanowire Double Quantum Dot
Nano Letters ( IF 9.6 ) Pub Date : 2018-07-10 00:00:00 , DOI: 10.1021/acs.nanolett.8b01153
Ji-Yin Wang ₁ , Guang-Yao Huang ₁ , Shaoyun Huang ₁ , Jianhong Xue ₁ , Dong Pan ₂ , Jianhua Zhao ₂ , Hongqi Xu _{1,

3}

Affiliation

We report on experimental detection of the spin–orbit interaction field in an InAs nanowire double quantum dot device. In the spin blockade regime, leakage current through the double quantum dot is measured and is used to extract the effects of spin–orbit interaction and hyperfine interaction on spin state mixing. At finite magnetic fields, the leakage current arising from the hyperfine interaction can be suppressed, and the spin–orbit interaction dominates spin state mixing. We observe dependence of the leakage current on the applied magnetic field direction and determine the direction of the spin–orbit interaction field. We show that the spin–orbit field lies in a direction perpendicular to the nanowire axis but with a pronounced off-substrate-plane angle. The results are expected to have an important implication in employing InAs nanowires to construct spin–orbit qubits and topological quantum devices.

中文翻译：

InAs纳米线双量子点中的各向异性Pauli自旋封锁效应和自旋轨道相互作用场

我们报告了InAs纳米线双量子点器件中自旋-轨道相互作用场的实验检测。在自旋封锁状态下，测量通过双量子点的泄漏电流，并用于提取自旋-轨道相互作用和超精细相互作用对自旋态混合的影响。在有限的磁场下，可以抑制由超精细相互作用引起的泄漏电流，并且自旋-轨道相互作用主导着自旋状态混合。我们观察到泄漏电流对所施加磁场方向的依赖性，并确定了自旋-轨道相互作用场的方向。我们表明，自旋轨道场位于垂直于纳米线轴的方向，但具有明显的基板外角。

更新日期：2018-07-10

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