Phys. Rev. B 76, 161308(R) (2007) [4 pages]Spin-state mixing in InAs double quantum dots
We quantify the contributions of hyperfine and spin-orbit-mediated singlet-triplet mixing in weakly coupled InAs quantum dots by electron transport spectroscopy in the Pauli spin-blockade regime. In contrast to double dots in GaAs, the spin-orbit coupling is found to be more than two orders of magnitudes larger than the hyperfine mixing energy. It is already effective at magnetic fields of a few mT, where deviations from pure hyperfine mixing are observed. © 2007 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.76.161308
DOI:
10.1103/PhysRevB.76.161308
PACS:
73.63.Kv, 72.25.−b
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