Multiple-Quantum Transitions and Charge-Induced Decoherence of Donor Nuclear Spins in Silicon

David P. Franke, Moritz P.D. Pflüger, Kohei M. Itoh, Martin S. Brandt

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Abstract

We study single- and multiquantum transitions of the nuclear spins of an ensemble of ionized arsenic donors in silicon and find quadrupolar effects on the coherence times, which we link to fluctuating electrical field gradients present after the application of light and bias voltage pulses. To determine the coherence times of superpositions of all orders in the 4-dimensional Hilbert space, we use a phase-cycling technique and find that, when electrical effects were allowed to decay, these times scale as expected for a fieldlike decoherence mechanism such as the interaction with surrounding Si29 nuclear spins.

Original languageEnglish
Article number246401
JournalPhysical review letters
Volume118
Issue number24
DOIs
Publication statusPublished - 2017 Jun 15

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ASJC Scopus subject areas

  • Physics and Astronomy(all)

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