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Electron spin coherence exceeding seconds in high-purity silicon

Author(s): Tyryshkin, AM; Tojo, S; Morton, JJL; Riemann, H; Abrosimov, NV; et al

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dc.contributor.authorTyryshkin, AM-
dc.contributor.authorTojo, S-
dc.contributor.authorMorton, JJL-
dc.contributor.authorRiemann, H-
dc.contributor.authorAbrosimov, NV-
dc.contributor.authorBecker, P-
dc.contributor.authorPohl, H-J-
dc.contributor.authorSchenkel, T-
dc.contributor.authorThewalt, MLW-
dc.contributor.authorItoh, KM-
dc.contributor.authorLyon, Stephen A-
dc.date.accessioned2021-10-08T20:15:55Z-
dc.date.available2021-10-08T20:15:55Z-
dc.date.issued2011-12-4en_US
dc.identifier.citationTyryshkin, AM, Tojo, S, Morton, JJL, Riemann, H, Abrosimov, NV, Becker, P, Pohl, H-J, Schenkel, T, Thewalt, MLW, Itoh, KM, Lyon, SA. (2012). Electron spin coherence exceeding seconds in high-purity silicon. Nature Materials, 11 (143 - 147. doi:10.1038/nmat3182en_US
dc.identifier.urihttp://arks.princeton.edu/ark:/88435/pr1nk2j-
dc.description.abstractSilicon is one of the most promising semiconductor materials for spin-based information processing devices. Its advanced fabrication technology facilitates the transition from individual devices to large-scale processors, and the availability of a 28Si form with no magnetic nuclei overcomes a primary source of spin decoherence in many other materials. Nevertheless, the coherence lifetimes of electron spins in the solid state have typically remained several orders of magnitude lower than that achieved in isolated high-vacuum systems such as trapped ions. Here we examine electron spin coherence of donors in pure 28Si material (residual 29Si concentration <50 ppm) with donor densities of 1014-1015 cm3. We elucidate three mechanisms for spin decoherence, active at different temperatures, and extract a coherence lifetime T2 up to 2 s. In this regime, we find the electron spin is sensitive to interactions with other donor electron spins separated by ∼200 nm. A magnetic field gradient suppresses such interactions, producing an extrapolated electron spin T2 of 10 s at 1.8 K. These coherence lifetimes are without peer in the solid state and comparable to high-vacuum qubits, making electron spins of donors in silicon ideal components of quantum computers, or quantum memories for systems such as superconducting qubits.en_US
dc.format.extent143 - 147en_US
dc.language.isoen_USen_US
dc.relation.ispartofNature Materialsen_US
dc.rightsAuthor's manuscripten_US
dc.titleElectron spin coherence exceeding seconds in high-purity siliconen_US
dc.typeJournal Articleen_US
dc.identifier.doidoi:10.1038/nmat3182-
dc.date.eissued2011-12-4en_US
pu.type.symplectichttp://www.symplectic.co.uk/publications/atom-terms/1.0/journal-articleen_US

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