2012/01/31 by S. Nadj-Perge, V. S. Pribiag, J. W. G. van den Berg +5 · 1 citation
Physics and Astronomy · #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevlett.108.166801
published as Phys. Rev. Lett. 108, 166801 (2012) · 5 pages, supplementary material available at http://link.aps.org/supplemental/10.1103/PhysRevLett.108.166801
arxiv created 2012/04/26 · arxiv updated 2012/04/27
Double quantum dot in the few-electron regime is achieved using local gating in an InSb nanowire. The spectrum of two-electron eigenstates is investigated using electric dipole spin resonance. Singlet-triplet level repulsion caused by spin-orbit interaction is observed. The size and the anisotropy of singlet-triplet repulsion are used to determine the magnitude and the orientation of the spin-orbit effective field in an InSb nanowire double dot. The obtained results are confirmed using spin blockade leakage current anisotropy and transport spectroscopy of individual quantum dots.