Abstract
A 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.
- Received 9 January 2012
DOI:https://doi.org/10.1103/PhysRevLett.108.166801
© 2012 American Physical Society
Synopsis
The Hunting of the Majorana Fermion
Published 19 April 2012
Nanowires made from indium-antimonide offer the best chance for detecting Majorana fermions that may ultimately perform as robust qubits.
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