TY - JOUR AB - The spin-orbit interaction permits to control the state of a spin qubit via electric fields. For holes it is particularly strong, allowing for fast all electrical qubit manipulation, and yet an in-depth understanding of this interaction in hole systems is missing. Here we investigate, experimentally and theoretically, the effect of the cubic Rashba spin-orbit interaction on the mixing of the spin states by studying singlet-triplet oscillations in a planar Ge hole double quantum dot. Landau-Zener sweeps at different magnetic field directions allow us to disentangle the effects of the spin-orbit induced spin-flip term from those caused by strongly site-dependent and anisotropic quantum dot g tensors. Our work, therefore, provides new insights into the hole spin-orbit interaction, necessary for optimizing future qubit experiments. AU - Jirovec, Daniel AU - Mutter, Philipp M. AU - Hofmann, Andrea C AU - Crippa, Alessandro AU - Rychetsky, Marek AU - Craig, David L. AU - Kukucka, Josip AU - Martins, Frederico AU - Ballabio, Andrea AU - Ares, Natalia AU - Chrastina, Daniel AU - Isella, Giovanni AU - Burkard, Guido AU - Katsaros, Georgios ID - 10920 IS - 12 JF - Physical Review Letters TI - Dynamics of hole singlet-triplet qubits with large g-factor differences VL - 128 ER -