Hole spin in tunable Ge hut wire double quantum dot

• URL: http://arxiv.org/abs/2001.04834v2
• Date: Fri, 8 May 2020 02:44:05 GMT
• Title: Hole spin in tunable Ge hut wire double quantum dot
• Authors: Gang Xu, Fei Gao, Ke Wang, Ting Zhang, He Liu, Gang Cao, Ting Wang, Jian-Jun Zhang, Hong-Wen Jiang, Hai-Ou Li and Guo-Ping Guo
• Abstract summary: 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.
• Score: 18.480053435503994
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: 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 the PSB leakage current, we obtain a spin-orbit length l_so 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.

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