Singlet-triplet minus mixing and relaxation lifetimes in a double donor dot
S. K. Gorman (University of New South Wales)
M. A. Broome (University of New South Wales)
M. G. House (University of New South Wales)
S. J. Hile (University of New South Wales)
J. Keizer (University of New South Wales, Centre of Excellence for Quantum Computation and Communication Technology)
D. Keith (University of New South Wales)
T.F. Watson (Centre of Excellence for Quantum Computation and Communication Technology, Kavli institute of nanoscience Delft, University of New South Wales, TU Delft - QCD/Vandersypen Lab)
W. J. Baker (University of New South Wales)
Michelle Y. Simmons (University of New South Wales)
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Abstract
We measure singlet-triplet mixing in a precision fabricated double donor dot comprising 2 and 1 phosphorus atoms separated by 16 ± 1 nm. We identify singlet and triplet-minus states by performing a sequential independent spin readout of the two electron system and probe its dependence on magnetic field strength. The relaxation of singlet and triplet states is measured to be 12.4 ± 1.0 s and 22.1 ± 1.0 s, respectively, at Bz = 2.5 T.
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