Anisotropic <i>g</i>-Factor and Spin–Orbit Field in a Germanium Hut Wire Double Quantum Dot

Holes in nanowires have drawn significant attention recent years because of the strong spin-orbit interaction, which plays an important role constructing Majorana zero modes and manipulating qubits. Here, from strongly anisotropic leakage current spin blockade regime for a double dot, we extract full g-tensor find that field is plane with azimuthal angle 59{\deg} to axis nanowire. The direction indicates interaction along nanowire, may originated interface inversion asymmetry Ge hut wires. We also demonstrate two different relaxation mechanisms holes wire dot: spin-flip cotunneling leads, within dot. These results help establish feasibility Ge-based quantum processor.