Journal article

Spin-orbit coupling in silicon for electrons bound to donors

Bent Weber, Yu-Ling Hsueh, Thomas F Watson, Ruoyu Li, Alexander R Hamilton, Lloyd CL Hollenberg, Rajib Rahman, Michelle Y Simmons

NPJ QUANTUM INFORMATION | SPRINGERNATURE | Published : 2018

Abstract

Spin–orbit coupling (SOC) is fundamental to a wide range of phenomena in condensed matter, spanning from a renormalisation of the free-electron g-factor, to the formation of topological insulators, and Majorana Fermions. SOC has also profound implications in spin-based quantum information, where it is known to limit spin lifetimes (T1) in the inversion asymmetric semiconductors such as GaAs. However, for electrons in silicon—and in particular those bound to phosphorus donor qubits—SOC is usually regarded weak, allowing for spin lifetimes of minutes in the bulk. Surprisingly, however, in a nanoelectronic device donor spin lifetimes have only reached values of seconds. Here, we reconcile this ..

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University of Melbourne Researchers

Grants

Awarded by Australian Research Council (ARC) Centre of Excellence for Quantum Computation and Communication Technology


Awarded by US Army Research Office


Awarded by ARC DECRA fellowship


Awarded by Singapore National Research Foundation (NRF) Fellowship


Awarded by US National Security Agency


Funding Acknowledgements

We thank S. Mahapatra for useful discussions. The device was fabricated in part at the New South Wales node of the Australian National Fabrication Facility. This research was conducted by the Australian Research Council (ARC) Centre of Excellence for Quantum Computation and Communication Technology (project number CE110001027), the US National Security Agency and the US Army Research Office under contract number W911NF-17-1-1-0202, and the ARC Discovery Project scheme. BW acknowledges an ARC DECRA fellowship (project number DE160101334) and a Singapore National Research Foundation (NRF) Fellowship (NRF-NRFF2017-11). M.Y.S. acknowledges an ARC Laureate Fellowship.