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Measuring central-spin interaction with a spin bath by pulsed ENDOR : towards suppression of spin diffusion decoherence

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Balian, S., Kunze, M., Mohammady, M., Morley, Gavin, Witzel, W., Kay, C. and Monteiro, T. (2012) Measuring central-spin interaction with a spin bath by pulsed ENDOR : towards suppression of spin diffusion decoherence. Physical Review B (Condensed Matter and Materials Physics), Vol.86 (No.10). Article no. 104428 . doi:10.1103/PhysRevB.86.104428 ISSN 1098-0121.

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Official URL: http://dx.doi.org/10.1103/PhysRevB.86.104428

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Abstract

We present pulsed electron-nuclear double resonance (ENDOR) experiments which enable us to characterize the coupling between bismuth donor spin qubits in Si and the surrounding spin bath of Si-29 impurities which provides the dominant decoherence mechanism (nuclear spin diffusion) at low temperatures (< 16 K). Decoupling from the spin bath is predicted and cluster correlation expansion simulations show near-complete suppression of spin diffusion, at optimal working points. The suppression takes the form of sharply peaked divergences of the spin diffusion coherence time, in contrast with previously identified broader regions of insensitivity to classical fluctuations. ENDOR data suggest that anisotropic contributions are comparatively weak, so the form of the divergences is largely independent of crystal orientation.

Item Type: Journal Article
Divisions: Faculty of Science, Engineering and Medicine > Science > Physics
Journal or Publication Title: Physical Review B (Condensed Matter and Materials Physics)
Publisher: American Physical Society
ISSN: 1098-0121
Official Date: 21 September 2012
Dates:
DateEvent
21 September 2012Published
Volume: Vol.86
Number: No.10
Page Range: Article no. 104428
DOI: 10.1103/PhysRevB.86.104428
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Restricted or Subscription Access

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