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Hole spin in tunable Ge hut wire double quantum dot
Applied Physics Express ( IF 2.3 ) Pub Date : 2020-05-07 , DOI: 10.35848/1882-0786/ab8b6d
Gang Xu 1, 2 , Fei Gao 3 , Ke Wang 1, 2 , Ting Zhang 1, 2 , He Liu 1, 2 , Gang Cao 1, 2 , Ting Wang 3 , Jian-Jun Zhang 3 , Hong-Wen Jiang 4 , Hai-Ou Li 1, 2 , Guo-Ping Guo 1, 2, 5
Affiliation  

Holes in germanium (Ge) exhibit strong spin–orbit interaction, which can be exploited for fast and all-electrical manipulation of spin states. Here, we report transport experiments in a tunable Ge hut wire hole double quantum dot. We observe the signatures of Pauli spin blockade (PSB) with a large singlet-triplet energy splitting of ~1.1 meV and extract the g factor. By analyzing the PSB leakage current, we obtain a spin–orbit length of ~40–100 nm. Furthermore, we demonstrate the electric dipole spin resonance. These results lay a solid foundation for implementing high quality tunable hole spin–orbit qubits.

中文翻译:

可调锗屋线双量子点中的空穴自旋

锗 (Ge) 中的空穴表现出强烈的自旋轨道相互作用,可用于快速和全电操纵自旋态。在这里,我们报告了可调谐 Ge hut 线孔双量子点中的输运实验。我们观察到泡利自旋阻塞 (PSB) 的特征,其具有约 1.1 meV 的大单线态-三线态能量分裂并提取 g 因子。通过分析 PSB 漏电流,我们获得了约 40-100 nm 的自旋轨道长度。此外,我们展示了电偶极自旋共振。这些结果为实现高质量的可调谐空穴自旋轨道量子位奠定了坚实的基础。
更新日期:2020-05-07
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