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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
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: |
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| 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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