Hole spin in tunable Ge hut wire double quantum dot
APPLIED PHYSICS EXPRESS(2020)
摘要
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 similar to 1.1 meV and extract the g factor. By analyzing the PSB leakage current, we obtain a spin-orbit length of similar to 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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关键词
Ge double quantum dot,spin blockade,electric dipole spin resonance,hole spin,spin-orbit interaction
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