We measure singlet-triplet mixing in a precision fabricated double donor dot comprising of 2 and 1 phosphorus atoms separated by 16±1 nm. We identify singlet and triplet-minus states by performing sequential independent spin readout of the two electron system and probe its dependence on magnetic field strength. The relaxation of singlet and triplet states are measured to be 12.4±1.0 s and 22.1±1.0 s respectively at Bz=2.5 T.
@article{arxiv.1807.10289,
title = {Singlet-triplet minus mixing and relaxation lifetimes in a double donor dot},
author = {S. K. Gorman and M. A. Broome and M. G. House and S. J. Hile and J. G. Keizer and D. Keith and T. F. Watson and W. J. Baker and M. Y. Simmons},
journal= {arXiv preprint arXiv:1807.10289},
year = {2018}
}