2016/03/17 by Matthias Brauns, Joost Ridderbos, Ang Li +2
Engineering · Mathematics · Physics and Astronomy · #Advancements in Semiconductor Devices and Circuit Design #Anisotropy #Condensed matter physics #Core (optical fiber) #Electric field #Field (mathematics) #Materials science #Mathematics #Nanotechnology #Nanowire #Nanowire Synthesis and Applications #Optics #Physics #Pure mathematics #Quantum and electron transport phenomena #Quantum dot #Quantum mechanics #Shell (structure) #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevb.93.121408
published as Physical Review B, 93(12), 121408(R) (2016)
openalex publication_date 2016/03/17 · arxiv created 2016/03/18 · arxiv updated 2016/03/21 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We present angle-dependent measurements of the effective g factor g^\ensuremath⋆ in a Ge-Si core-shell nanowire quantum dot. g^\ensuremath⋆ is found to be maximum when the magnetic field is pointing perpendicularly to both the nanowire and the electric field induced by local gates. Alignment of the magnetic field with the electric field reduces g^\ensuremath⋆ significantly. g^\ensuremath⋆ is almost completely quenched when the magnetic field is aligned with the nanowire axis. These findings confirm recent calculations, where the obtained anisotropy is attributed to a Rashba-type spin-orbit interaction induced by heavy-hole light-hole mixing. In principle, this facilitates manipulation of spin-orbit qubits by means of a continuous high-frequency electric field.