2021/02/28 by Ting Zhang, He Liu, Fei Gao +11
Materials Science · Physics and Astronomy · #Anisotropy #Asymmetry #Condensed matter physics #Germanium #Graphene research and applications #MAJORANA #Magnetic field #Nanowire #Optoelectronics #Physics #Quantum #Quantum and electron transport phenomena #Quantum dot #Quantum mechanics #Quantum wire #Qubit #Silicon #Spin (aerodynamics) #Spin–orbit interaction #Superconductivity #Topological Materials and Phenomena #cond-mat.mes-hall #quant-ph
paper · pdf · doi:10.1021/acs.nanolett.1c00263
published as Nano Letters 21 (9), 3835-3842 (2021) · 23 pages, 5 figures
openalex publication_date 2021/04/29 · arxiv created 2021/05/18 · arxiv updated 2021/05/19 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Holes in nanowires have drawn significant attention in recent years because of the strong spin–orbit interaction, which plays an important role in constructing Majorana zero modes and manipulating spin–orbit qubits. Here, from the strongly anisotropic leakage current in the spin blockade regime for a double dot, we extract the full g -tensor and find that the spin–orbit field is in plane with an azimuthal angle of 59° to the axis of the nanowire. The direction of the spin–orbit field indicates a strong spin–orbit interaction along the nanowire, which may have originated from the interface inversion asymmetry in Ge hut wires. We also demonstrate two different spin relaxation mechanisms for the holes in the Ge hut wire double dot: spin-flip co-tunneling to the leads, and spin–orbit interaction within the double dot. These results help establish feasibility of a Ge-based quantum processor.