Anomalies in the NMR of Silicon: Unexpected Spin Echoes in a Dilute Dipolar Solid

Abstract

NMR spin echo measurements of ${}^{29}$Si in Silicon powders have uncovered a variety of surprising phenomena that appear to be independent of doping. These surprises include long tails and even-odd asymmetry in Carr-Purcell-Meiboom-Gill (CPMG) echo trains, and anomalous stimulated echoes with several peculiar characteristics. Given the simplicity of this spin system, these results, which to date defy explanation, present a new and interesting puzzle in solid state NMR. In the broader context of quantum computation, these experiments suggest that similar surprises may be found in other systems with small, long-range, qubit-qubit interactions, particularly when ``bang-bang'' control is used.

arXiv comment4 pgs., 5 color eps figs, REVTEX 4.0, accepted to appear in Phys. Rev. B

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• An all silicon quantum computer
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Cited by in corpus (20)

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• Coherence Time of a Solid-State Nuclear Qubit
• Measurement of the Noise Spectrum Using a Multiple-Pulse Sequence
• Dynamic Nuclear Polarization in Silicon Microparticles
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• Strongly interacting ultracold polar molecules
• Coherent Control of a Single Silicon-29 Nuclear Spin Qubit
• Nuclear Spins as Quantum Memory in Semiconductor Nanostructures
• The Intrinsic Origin of Spin Echoes in Dipolar Solids Generated by Strong Pi Pulses
• Generating Unexpected Spin Echoes in Dipolar Solids with Pi Pulses
• Dynamical suppression of fluctuations in an interacting nuclear spin bath of a self-assembled quantum dot using multiple pulse nuclear magnetic resonance
• Manifestations of the absence of spin diffusion in multipulse NMR experiments on diluted dipolar solids
• Decoherence of nuclear spins in the "frozen core" of an electron spin
• ${}^{29}$Si nuclear spins as a resource for donor spin qubits in silicon
• Coherent storage of photoexcited triplet states using 29Si nuclear spins in silicon
• Long-lived coherence in driven spin systems: from two to infinite spatial dimensions
• Spin Dynamics of CPMG sequence in time-dependent magnetic fields
• Long-lived selective spin echoes in dipolar solids under periodic and aperiodic pi-pulse trains
• Controlled synthesis and characterization of porous silicon nanoparticles for dynamic nuclear polarization
• Microscopic investigation of enhanced Pauli paramagnetism in metallic Pu${}_2$C${}_3$