Gate-Tunable Spin-Orbit Coupling in a Germanium Hole Double Quantum Dot

Hole spins confined in semiconductor quantum dot systems have gained considerable interest for their strong spin-orbit interactions (SOIs) and relatively weak hyperfine interactions. Here we experimentally demonstrate a tunable SOI double Germanium (Ge) hut wire (HW), which could help enable fast all-electric spin manipulations while suppressing unwanted decoherence. Specifically, measure the transport spectra Pauli blockade regime device.By adjusting interdot tunnel coupling, obtain an electric field tuned length lso = 2.0 - 48.9 nm. This tunability of pave way toward realization high-fidelity qubits Ge HW systems.